Page last updated: 2024-10-24

muscle contraction

Definition

Target type: biologicalprocess

A process in which force is generated within muscle tissue, resulting in a change in muscle geometry. Force generation involves a chemo-mechanical energy conversion step that is carried out by the actin/myosin complex activity, which generates force through ATP hydrolysis. [GOC:ef, GOC:mtg_muscle, ISBN:0198506732]

Muscle contraction is a complex process involving the interaction of proteins within muscle fibers. It is initiated by a signal from the nervous system, which triggers a series of events leading to the sliding of the actin and myosin filaments past each other.

1. **Neural Stimulation:** A nerve impulse arrives at the neuromuscular junction, the point where a motor neuron meets a muscle fiber. This triggers the release of acetylcholine, a neurotransmitter, into the synaptic cleft.

2. **Action Potential Propagation:** Acetylcholine binds to receptors on the muscle fiber membrane, initiating an action potential that travels along the sarcolemma and into the T-tubules, invaginations of the sarcolemma that extend deep into the muscle fiber.

3. **Calcium Release:** The action potential triggers the release of calcium ions (Ca2+) from the sarcoplasmic reticulum (SR), a network of internal membranes within the muscle fiber.

4. **Actin-Myosin Interaction:** Calcium binds to troponin, a protein associated with tropomyosin, which normally blocks the binding sites on actin filaments. This binding causes a conformational change in tropomyosin, exposing the myosin-binding sites on actin.

5. **Cross-Bridge Cycling:** Myosin heads, which are already energized by ATP hydrolysis, bind to the exposed sites on actin filaments. This forms a cross-bridge. The myosin head then undergoes a power stroke, pulling the actin filament towards the center of the sarcomere, the basic contractile unit of a muscle fiber.

6. **ATP Binding and Detachment:** ATP binds to the myosin head, causing it to detach from actin. The myosin head then hydrolyzes ATP, using the energy to re-cock its head into a high-energy position.

7. **Relaxation:** When the neural stimulation ceases, calcium is pumped back into the SR by active transport. This causes troponin to return to its original conformation, blocking the myosin-binding sites on actin. The muscle fiber relaxes.

8. **Muscle Fiber Types:** Different types of muscle fibers (fast-twitch and slow-twitch) have different contractile speeds and fatigue resistance. The specific type of muscle fiber determines its function in the body.'
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Proteins (20)

ProteinDefinitionTaxonomy
Peptidyl-prolyl cis-trans isomerase FKBP1A[no definition available]Bos taurus (cattle)
Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4A potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4 that is encoded in the genome of human. [PRO:CNA, UniProtKB:Q9Y3Q4]Homo sapiens (human)
Potassium voltage-gated channel subfamily D member 2A voltage-gated potassium channel KCND2 that is encoded in the genome of human. [PRO:CNA, UniProtKB:Q9NZV8]Homo sapiens (human)
Leukotriene B4 receptor 1A leukotriene B4 receptor 1 that is encoded in the genome of human. [PRO:WCB, UniProtKB:Q15722]Homo sapiens (human)
Voltage-dependent L-type calcium channel subunit alpha-1SA voltage-dependent L-type calcium channel subunit alpha-1S that is encoded in the genome of human. [PRO:WCB, UniProtKB:Q13698]Homo sapiens (human)
Aspartyl/asparaginyl beta-hydroxylaseAn aspartyl/asparaginyl beta-hydroxylase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q12797]Homo sapiens (human)
Acetylcholine receptor subunit deltaAn acetylcholine receptor subunit delta that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q07001]Homo sapiens (human)
Acetylcholine receptor subunit epsilonAn acetylcholine receptor subunit epsilon that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q04844]Homo sapiens (human)
Sodium- and chloride-dependent creatine transporter 1A sodium- and chloride-dependent creatine transporter 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P48029]Homo sapiens (human)
UtrophinA utrophin that is encoded in the genome of human. [PRO:DNx, UniProtKB:P46939]Homo sapiens (human)
Sodium channel protein type 4 subunit alphaA sodium channel protein type 4 subunit alpha that is encoded in the genome of human. [PRO:WCB, UniProtKB:P35499]Homo sapiens (human)
Oxytocin receptorAn oxytocin receptor that is encoded in the genome of human. [PRO:WCB, UniProtKB:P30559]Homo sapiens (human)
Glycine receptor subunit alpha-1A glycine receptor subunit alpha-1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P23415]Homo sapiens (human)
Ryanodine receptor 1A ryanodine receptor 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P21817]Homo sapiens (human)
Substance-K receptorA substance-K receptor that is encoded in the genome of human. [PRO:WCB, UniProtKB:P21452]Homo sapiens (human)
Acetylcholine receptor subunit betaAn acetylcholine receptor subunit beta that is encoded in the genome of human. [PRO:DNx, UniProtKB:P11230]Homo sapiens (human)
Acetylcholine receptor subunit gammaAn acetylcholine receptor subunit gamma that is encoded in the genome of human. [PRO:DNx, UniProtKB:P07510]Homo sapiens (human)
Alpha-crystallin B chainAn alpha-crystallin B chain that is encoded in the genome of human. [PRO:DNx, UniProtKB:P02511]Homo sapiens (human)
Voltage-dependent T-type calcium channel subunit alpha-1HA voltage-dependent T-type calcium channel subunit alpha-1H that is encoded in the genome of human. [PRO:DNx, UniProtKB:O95180]Homo sapiens (human)
Galanin receptor type 2A galanin receptor type 2 that is encoded in the genome of human. [PRO:WCB, UniProtKB:O43603]Homo sapiens (human)

Compounds (261)

CompoundDefinitionClassesRoles
bupropionbupropion : An aromatic ketone that is propiophenone carrying a tert-butylamino group at position 2 and a chloro substituent at position 3 on the phenyl ring.

Bupropion: A propiophenone-derived antidepressant and antismoking agent that inhibits the uptake of DOPAMINE.
aromatic ketone;
monochlorobenzenes;
secondary amino compound
antidepressant;
environmental contaminant;
xenobiotic
creatineglycine derivative;
guanidines;
zwitterion
geroprotector;
human metabolite;
mouse metabolite;
neuroprotective agent;
nutraceutical
glycinealpha-amino acid;
amino acid zwitterion;
proteinogenic amino acid;
serine family amino acid
EC 2.1.2.1 (glycine hydroxymethyltransferase) inhibitor;
fundamental metabolite;
hepatoprotective agent;
micronutrient;
neurotransmitter;
NMDA receptor agonist;
nutraceutical
epibatidinealkaloid
gallopamilGallopamil: Coronary vasodilator that is an analog of iproveratril (VERAPAMIL) with one more methoxy group on the benzene ring.benzenes;
organic amino compound
1,10-phenanthroline1,10-phenanthroline: RN given refers to parent cpd; inhibits Zn-dependent metalloproteinasesphenanthrolineEC 2.7.1.1 (hexokinase) inhibitor;
EC 3.4.19.3 (pyroglutamyl-peptidase I) inhibitor
4-nonylphenol4-nonylphenol : A member of the class of phenols that is phenol which is para-substituted with a nonyl group.

4-nonylphenol: structure in first source; see also record for nonylphenol
phenolsenvironmental contaminant
phenytoinimidazolidine-2,4-dioneanticonvulsant;
drug allergen;
sodium channel blocker;
teratogenic agent
tacrinetacrine : A member of the class of acridines that is 1,2,3,4-tetrahydroacridine substituted by an amino group at position 9. It is used in the treatment of Alzheimer's disease.

Tacrine: A cholinesterase inhibitor that crosses the blood-brain barrier. Tacrine has been used to counter the effects of muscle relaxants, as a respiratory stimulant, and in the treatment of Alzheimer's disease and other central nervous system disorders.
acridines;
aromatic amine
EC 3.1.1.7 (acetylcholinesterase) inhibitor
N-(2-aminoethyl)-5-chloro-1-naphthalenesulfonamidenaphthalenes;
sulfonic acid derivative
amiodaroneamiodarone : A member of the class of 1-benzofurans that is 1-benzofuran substituted by a butyl group at position 2 and a 4-[2-(diethylamino)ethoxy]-3,5-diiodobenzoyl group at position 3. It is a cardiovascular drug used for the treatment of cardiac dysrhythmias.

Amiodarone: An antianginal and class III antiarrhythmic drug. It increases the duration of ventricular and atrial muscle action by inhibiting POTASSIUM CHANNELS and VOLTAGE-GATED SODIUM CHANNELS. There is a resulting decrease in heart rate and in vascular resistance.
1-benzofurans;
aromatic ketone;
organoiodine compound;
tertiary amino compound
cardiovascular drug
amitriptylineamitriptyline : An organic tricyclic compound that is 10,11-dihydro-5H-dibenzo[a,d][7]annulene substituted by a 3-(dimethylamino)propylidene group at position 5.

Amitriptyline: Tricyclic antidepressant with anticholinergic and sedative properties. It appears to prevent the re-uptake of norepinephrine and serotonin at nerve terminals, thus potentiating the action of these neurotransmitters. Amitriptyline also appears to antagonize cholinergic and alpha-1 adrenergic responses to bioactive amines.
carbotricyclic compound;
tertiary amine
adrenergic uptake inhibitor;
antidepressant;
environmental contaminant;
tropomyosin-related kinase B receptor agonist;
xenobiotic
astemizoleastemizole : A piperidine compound having a 2-(4-methoxyphenyl)ethyl group at the 1-position and an N-[(4-fluorobenzyl)benzimidazol-2-yl]amino group at the 4-position.

Astemizole: Antihistamine drug now withdrawn from the market in many countries because of rare but potentially fatal side effects.
benzimidazoles;
piperidines
anti-allergic agent;
anticoronaviral agent;
H1-receptor antagonist
bepridilbepridil : A tertiary amine in which the substituents on nitrogen are benzyl, phenyl and 3-(2-methylpropoxy)-2-(pyrrolidin-1-yl)propyl.

Bepridil: A long-acting calcium-blocking agent with significant anti-anginal activity. The drug produces significant coronary vasodilation and modest peripheral effects. It has antihypertensive and selective anti-arrhythmia activities and acts as a calmodulin antagonist.
pyrrolidines;
tertiary amine
anti-arrhythmia drug;
antihypertensive agent;
calcium channel blocker;
vasodilator agent
bithionolbithionol : An aryl sulfide that is diphenyl sulfide in which each phenyl group is substituted at position 2 by hydroxy and at positions 3 and 5 by chlorine. A fungicide and anthelmintic, it was used in various topical drug products for the treatment of liver flukes, but withdrawn after being shown to be a potent photosensitizer with the potential to cause serious skin disorders.

Bithionol: Halogenated anti-infective agent that is used against trematode and cestode infestations.
aryl sulfide;
bridged diphenyl antifungal drug;
bridged diphenyl fungicide;
dichlorobenzene;
organochlorine pesticide;
polyphenol
antifungal agrochemical;
antiplatyhelmintic drug
verapamil2-(3,4-dimethoxyphenyl)-5-{[2-(3,4-dimethoxyphenyl)ethyl](methyl)amino}-2-(propan-2-yl)pentanenitrile : A tertiary amino compound that is 3,4-dimethoxyphenylethylamine in which the hydrogens attached to the nitrogen are replaced by a methyl group and a 4-cyano-4-(3,4-dimethoxyphenyl)-5-methylhexyl group.

verapamil : A racemate comprising equimolar amounts of dexverapamil and (S)-verapamil. An L-type calcium channel blocker of the phenylalkylamine class, it is used (particularly as the hydrochloride salt) in the treatment of hypertension, angina pectoris and cardiac arrhythmia, and as a preventive medication for migraine.

Verapamil: A calcium channel blocker that is a class IV anti-arrhythmia agent.
aromatic ether;
nitrile;
polyether;
tertiary amino compound
carbamazepinecarbamazepine : A dibenzoazepine that is 5H-dibenzo[b,f]azepine carrying a carbamoyl substituent at the azepine nitrogen, used as an anticonvulsant.

Carbamazepine: A dibenzazepine that acts as a sodium channel blocker. It is used as an anticonvulsant for the treatment of grand mal and psychomotor or focal SEIZURES. It may also be used in the management of BIPOLAR DISORDER, and has analgesic properties.
dibenzoazepine;
ureas
analgesic;
anticonvulsant;
antimanic drug;
drug allergen;
EC 3.5.1.98 (histone deacetylase) inhibitor;
environmental contaminant;
glutamate transporter activator;
mitogen;
non-narcotic analgesic;
sodium channel blocker;
xenobiotic
chlorpromazinechlorpromazine : A substituted phenothiazine in which the ring nitrogen at position 10 is attached to C-3 of an N,N-dimethylpropanamine moiety.

Chlorpromazine: The prototypical phenothiazine antipsychotic drug. Like the other drugs in this class chlorpromazine's antipsychotic actions are thought to be due to long-term adaptation by the brain to blocking DOPAMINE RECEPTORS. Chlorpromazine has several other actions and therapeutic uses, including as an antiemetic and in the treatment of intractable hiccup.
organochlorine compound;
phenothiazines;
tertiary amine
anticoronaviral agent;
antiemetic;
dopaminergic antagonist;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
phenothiazine antipsychotic drug
cifenlinediarylmethane
ciglitazoneciglitazone : An aromatic ether that consists of 1,3-thiazolidine-2,4-dione with position 5 substituted by a 4-[(1-methylcyclohexyl)methoxy]benzyl group. A selective PPARgamma agonist.

ciglitazone: structure given in second source; PPAR agonist used for type II diabetes
aromatic ether;
thiazolidinone
antineoplastic agent;
insulin-sensitizing drug
cilostazollactam;
tetrazoles
anticoagulant;
bronchodilator agent;
EC 3.1.4.17 (3',5'-cyclic-nucleotide phosphodiesterase) inhibitor;
fibrin modulating drug;
neuroprotective agent;
platelet aggregation inhibitor;
vasodilator agent
cisapridecisapride : The amide resulting from formal condensation of 4-amino-5-chloro-2-methoxybenzoic acid with cis-1-[3-(4-fluorophenoxy)propyl]-3-methoxypiperidin-4-amine. It has been used (as its monohydrate or as its tartrate) for the treatment of gastro-oesophageal reflux disease and for non-ulcer dyspepsia, but its propensity to cause cardiac arrhythmias resulted in its complete withdrawal from many countries, including the U.K., and restrictions on its use elsewhere.

Cisapride: A substituted benzamide used for its prokinetic properties. It is used in the management of gastroesophageal reflux disease, functional dyspepsia, and other disorders associated with impaired gastrointestinal motility. (Martindale The Extra Pharmacopoeia, 31st ed)
benzamides
clotrimazoleconazole antifungal drug;
imidazole antifungal drug;
imidazoles;
monochlorobenzenes
antiinfective agent;
environmental contaminant;
xenobiotic
diazepamdiazepam : A 1,4-benzodiazepinone that is 1,3-dihydro-2H-1,4-benzodiazepin-2-one substituted by a chloro group at position 7, a methyl group at position 1 and a phenyl group at position 5.

Diazepam: A benzodiazepine with anticonvulsant, anxiolytic, sedative, muscle relaxant, and amnesic properties and a long duration of action. Its actions are mediated by enhancement of GAMMA-AMINOBUTYRIC ACID activity.
1,4-benzodiazepinone;
organochlorine compound
anticonvulsant;
anxiolytic drug;
environmental contaminant;
sedative;
xenobiotic
disopyramidedisopyramide : A monocarboxylic acid amide that is butanamide substituted by a diisopropylamino group at position 4, a phenyl group at position 2 and a pyridin-2-yl group at position 2. It is used as a anti-arrhythmia drug.

Disopyramide: A class I anti-arrhythmic agent (one that interferes directly with the depolarization of the cardiac membrane and thus serves as a membrane-stabilizing agent) with a depressant action on the heart similar to that of guanidine. It also possesses some anticholinergic and local anesthetic properties.
monocarboxylic acid amide;
pyridines;
tertiary amino compound
anti-arrhythmia drug
donepezil2-[(1-benzylpiperidin-4-yl)methyl]-5,6-dimethoxyindan-1-one : A member of the class of indanones that is 5,6-dimethoxyindan-1-one which is substituted at position 2 by an (N-benzylpiperidin-4-yl)methyl group.

donepezil : A racemate comprising equimolar amounts of (R)- and (S)-donepezil. A centrally acting reversible acetylcholinesterase inhibitor, its main therapeutic use is in the treatment of Alzheimer's disease where it is used to increase cortical acetylcholine.

Donepezil: An indan and piperidine derivative that acts as a selective and reversible inhibitor of ACETYLCHOLINESTERASE. Donepezil is highly selective for the central nervous system and is used in the management of mild to moderate DEMENTIA in ALZHEIMER DISEASE.
aromatic ether;
indanones;
piperidines;
racemate
EC 3.1.1.7 (acetylcholinesterase) inhibitor;
EC 3.1.1.8 (cholinesterase) inhibitor;
nootropic agent
droperidoldroperidol : An organofluorine compound that is haloperidol in which the hydroxy group has been eliminated with the introduction of a double bond in the piperidine ring, and the 4-chlorophenyl group has been replaced by a benzimidazol-2-on-1-yl group. It is used in the management of chemotherapy-induced nausea and vomiting, and in conjunction with an opioid analgesic such as fentanyl to maintain the patient in a calm state of neuroleptanalgesia with indifference to surroundings but still able to cooperate with the surgeon.

Droperidol: A butyrophenone with general properties similar to those of HALOPERIDOL. It is used in conjunction with an opioid analgesic such as FENTANYL to maintain the patient in a calm state of neuroleptanalgesia with indifference to surroundings but still able to cooperate with the surgeon. It is also used as a premedicant, as an antiemetic, and for the control of agitation in acute psychoses. (From Martindale, The Extra Pharmacopoeia, 29th ed, p593)
aromatic ketone;
benzimidazoles;
organofluorine compound
anaesthesia adjuvant;
antiemetic;
dopaminergic antagonist;
first generation antipsychotic
ebastineorganic molecular entity
econazole1-{2-(4-chlorobenzyloxy)-2-(2,4-dichlorophenyl)ethyl}imidazole : A member of the class of imidazoles that is 1-(2,4-dichlorophenyl)-2-(imidazol-1-yl)ethanol in which the hydroxyl hydrogen is replaced by a 4-chlorobenzyl group.

econazole : A racemate composed of equimolar amounts of (R)- and (S)-econazole. Used (as its nitrate salt) to treat skin infections such as athlete's foot, jock itch, ringworm and other fungal skin infections.

Econazole: An imidazole derivative that is commonly used as a topical antifungal agent.
dichlorobenzene;
ether;
imidazoles;
monochlorobenzenes
ellipticineellipticine : A organic heterotetracyclic compound that is pyrido[4,3-b]carbazole carrying two methyl substituents at positions 5 and 11.indole alkaloid;
organic heterotetracyclic compound;
organonitrogen heterocyclic compound;
polycyclic heteroarene
antineoplastic agent;
plant metabolite
flecainideflecainide : A monocarboxylic acid amide obtained by formal condensation of the carboxy group of 2,5-bis(2,2,2-trifluoroethoxy)benzoic acid with the primary amino group of piperidin-2-ylmethylamine. An antiarrhythmic agent used (in the form of its acetate salt) to prevent and treat tachyarrhythmia (abnormal fast rhythm of the heart).

Flecainide: A potent anti-arrhythmia agent, effective in a wide range of ventricular and atrial ARRHYTHMIAS and TACHYCARDIAS.
aromatic ether;
monocarboxylic acid amide;
organofluorine compound;
piperidines
anti-arrhythmia drug
fluphenazineN-alkylpiperazine;
organofluorine compound;
phenothiazines
anticoronaviral agent;
dopaminergic antagonist;
phenothiazine antipsychotic drug
fluspirileneFluspirilene: A long-acting injectable antipsychotic agent used for chronic schizophrenia.diarylmethane
gossypolGossypol: A dimeric sesquiterpene found in cottonseed (GOSSYPIUM). The (-) isomer is active as a male contraceptive (CONTRACEPTIVE AGENTS, MALE) whereas toxic symptoms are associated with the (+) isomer.
haloperidolhaloperidol : A compound composed of a central piperidine structure with hydroxy and p-chlorophenyl substituents at position 4 and an N-linked p-fluorobutyrophenone moiety.

Haloperidol: A phenyl-piperidinyl-butyrophenone that is used primarily to treat SCHIZOPHRENIA and other PSYCHOSES. It is also used in schizoaffective disorder, DELUSIONAL DISORDERS, ballism, and TOURETTE SYNDROME (a drug of choice) and occasionally as adjunctive therapy in INTELLECTUAL DISABILITY and the chorea of HUNTINGTON DISEASE. It is a potent antiemetic and is used in the treatment of intractable HICCUPS. (From AMA Drug Evaluations Annual, 1994, p279)
aromatic ketone;
hydroxypiperidine;
monochlorobenzenes;
organofluorine compound;
tertiary alcohol
antidyskinesia agent;
antiemetic;
dopaminergic antagonist;
first generation antipsychotic;
serotonergic antagonist
haloproginhaloprogin: minor descriptor (73-86); on-line & INDEX MEDICUS search PHENYL ETHERS (73-86)aromatic ether
hexachlorophenehexachlorophene : An organochlorine compound that is diphenylmethane in which each of the phenyl groups is substituted by chlorines at positions 2, 3, and 5, and by a hydroxy group at position 6. An antiseptic that is effective against Gram-positive organisms, it is used in soaps and creams for the treatment of various skin disorders. It is also used in agriculture as an acaricide and fungicide, but is not approved for such use within the European Union.

Hexachlorophene: A chlorinated bisphenol antiseptic with a bacteriostatic action against Gram-positive organisms, but much less effective against Gram-negative organisms. It is mainly used in soaps and creams and is an ingredient of various preparations used for skin disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p797)
bridged diphenyl fungicide;
polyphenol;
trichlorobenzene
acaricide;
antibacterial agent;
antifungal agrochemical;
antiseptic drug
lidocainelidocaine : The monocarboxylic acid amide resulting from the formal condensation of N,N-diethylglycine with 2,6-dimethylaniline.

Lidocaine: A local anesthetic and cardiac depressant used as an antiarrhythmia agent. Its actions are more intense and its effects more prolonged than those of PROCAINE but its duration of action is shorter than that of BUPIVACAINE or PRILOCAINE.
benzenes;
monocarboxylic acid amide;
tertiary amino compound
anti-arrhythmia drug;
drug allergen;
environmental contaminant;
local anaesthetic;
xenobiotic
imipramineimipramine : A dibenzoazepine that is 5H-dibenzo[b,f]azepine substituted by a 3-(dimethylamino)propyl group at the nitrogen atom.

Imipramine: The prototypical tricyclic antidepressant. It has been used in major depression, dysthymia, bipolar depression, attention-deficit disorders, agoraphobia, and panic disorders. It has less sedative effect than some other members of this therapeutic group.
dibenzoazepineadrenergic uptake inhibitor;
antidepressant;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor
ketamineketamine : A member of the class of cyclohexanones in which one of the hydrogens at position 2 is substituted by a 2-chlorophenyl group, while the other is substituted by a methylamino group.

Ketamine: A cyclohexanone derivative used for induction of anesthesia. Its mechanism of action is not well understood, but ketamine can block NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE) and may interact with sigma receptors.
cyclohexanones;
monochlorobenzenes;
secondary amino compound
analgesic;
environmental contaminant;
intravenous anaesthetic;
neurotoxin;
NMDA receptor antagonist;
xenobiotic
ketoconazole1-acetyl-4-(4-{[2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy}phenyl)piperazine : A dioxolane that is 1,3-dioxolane which is substituted at positions 2, 2, and 4 by imidazol-1-ylmethyl, 2,4-dichlorophenyl, and [para-(4-acetylpiperazin-1-yl)phenoxy]methyl groups, respectively.dichlorobenzene;
dioxolane;
ether;
imidazoles;
N-acylpiperazine;
N-arylpiperazine
lamotrigine1,2,4-triazines;
dichlorobenzene;
primary arylamine
anticonvulsant;
antidepressant;
antimanic drug;
calcium channel blocker;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
environmental contaminant;
excitatory amino acid antagonist;
geroprotector;
non-narcotic analgesic;
xenobiotic
loratadineloratadine : A benzocycloheptapyridine that is 6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine substituted by a chloro group at position 8 and a 1-(ethoxycarbonyl)piperidin-4-ylidene group at position 11. It is a H1-receptor antagonist commonly employed in the treatment of allergic disorders.

Loratadine: A second-generation histamine H1 receptor antagonist used in the treatment of allergic rhinitis and urticaria. Unlike most classical antihistamines (HISTAMINE H1 ANTAGONISTS) it lacks central nervous system depressing effects such as drowsiness.
benzocycloheptapyridine;
ethyl ester;
N-acylpiperidine;
organochlorine compound;
tertiary carboxamide
anti-allergic agent;
cholinergic antagonist;
geroprotector;
H1-receptor antagonist
mecamylamineMecamylamine: A nicotinic antagonist that is well absorbed from the gastrointestinal tract and crosses the blood-brain barrier. Mecamylamine has been used as a ganglionic blocker in treating hypertension, but, like most ganglionic blockers, is more often used now as a research tool.primary aliphatic amine
mefloquine hydrochloride[2,8-bis(trifluoromethyl)quinolin-4-yl]-(2-piperidyl)methanol : An organofluorine compound that consists of quinoline bearing trifluoromethyl substituents at positions 2 and 8 as well as a (2-piperidinyl)hydroxymethyl substituent at position 4.organofluorine compound;
piperidines;
quinolines;
secondary alcohol
methadone6-(dimethylamino)-4,4-diphenylheptan-3-one : A ketone that is heptan-3-one substituted by a dimethylamino group at position 6 and two phenyl groups at position 4.

methadone : A racemate comprising equimolar amounts of dextromethadone and levomethadone. It is a opioid analgesic which is used as a painkiller and as a substitute for heroin in the treatment of heroin addiction.

Methadone: A synthetic opioid that is used as the hydrochloride. It is an opioid analgesic that is primarily a mu-opioid agonist. It has actions and uses similar to those of MORPHINE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1082-3)
benzenes;
diarylmethane;
ketone;
tertiary amino compound
metronidazolemetronidazole : A member of the class of imidazoles substituted at C-1, -2 and -5 with 2-hydroxyethyl, nitro and methyl groups respectively. It has activity against anaerobic bacteria and protozoa, and has a radiosensitising effect on hypoxic tumour cells. It may be given by mouth in tablets, or as the benzoate in an oral suspension. The hydrochloride salt can be used in intravenous infusions. Metronidazole is a prodrug and is selective for anaerobic bacteria due to their ability to intracellularly reduce the nitro group of metronidazole to give nitroso-containing intermediates. These can covalently bind to DNA, disrupting its helical structure, inducing DNA strand breaks and inhibiting bacterial nucleic acid synthesis, ultimately resulting in bacterial cell death.

Metronidazole: A nitroimidazole used to treat AMEBIASIS; VAGINITIS; TRICHOMONAS INFECTIONS; GIARDIASIS; ANAEROBIC BACTERIA; and TREPONEMAL INFECTIONS.
C-nitro compound;
imidazoles;
primary alcohol
antiamoebic agent;
antibacterial drug;
antimicrobial agent;
antiparasitic agent;
antitrichomonal drug;
environmental contaminant;
prodrug;
radiosensitizing agent;
xenobiotic
mexiletinemexiletine : An aromatic ether which is 2,6-dimethylphenyl ether of 2-aminopropan-1-ol.

Mexiletine: Antiarrhythmic agent pharmacologically similar to LIDOCAINE. It may have some anticonvulsant properties.
aromatic ether;
primary amino compound
anti-arrhythmia drug
miconazole1-[2-(2,4-dichlorobenzyloxy)-2-(2,4-dichlorophenyl)ethyl]imidazole : A member of the class of imidazoles that is 1-(2,4-dichlorophenyl)-2-(imidazol-1-yl)ethanol in which the hydroxyl hydrogen is replaced by a 2,4-dichlorobenzyl group.

miconazole : A racemate composed of equimolar amounts of (R)- and (S)-miconazole. Used (as its nitrate salt) to treat skin infections such as athlete's foot, jock itch, ringworm and other fungal skin infections. It inhibits the synthesis of ergosterol, a critical component of fungal cell membranes.

Miconazole: An imidazole antifungal agent that is used topically and by intravenous infusion.
dichlorobenzene;
ether;
imidazoles
mitoxantronemitoxantrone : A dihydroxyanthraquinone that is 1,4-dihydroxy-9,10-anthraquinone which is substituted by 6-hydroxy-1,4-diazahexyl groups at positions 5 and 8.

Mitoxantrone: An anthracenedione-derived antineoplastic agent.
dihydroxyanthraquinoneanalgesic;
antineoplastic agent
nevirapinenevirapine : A dipyridodiazepine that is 5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepine which is substituted by methyl, oxo, and cyclopropyl groups at positions 4, 6, and 11, respectively. A non-nucleoside reverse transcriptase inhibitor with activity against HIV-1, it is used in combination with other antiretrovirals for the treatment of HIV infection.

Nevirapine: A potent, non-nucleoside reverse transcriptase inhibitor used in combination with nucleoside analogues for treatment of HIV INFECTIONS and AIDS.
cyclopropanes;
dipyridodiazepine
antiviral drug;
HIV-1 reverse transcriptase inhibitor
nifedipineNifedipine: A potent vasodilator agent with calcium antagonistic action. It is a useful anti-anginal agent that also lowers blood pressure.C-nitro compound;
dihydropyridine;
methyl ester
calcium channel blocker;
human metabolite;
tocolytic agent;
vasodilator agent
nimodipinenimodipine : A dihydropyridine that is 1,4-dihydropyridine which is substituted by methyl groups at positions 2 and 6, a (2-methoxyethoxy)carbonyl group at position 3, a m-nitrophenyl group at position 4, and an isopropoxycarbonyl group at position 5. An L-type calcium channel blocker, it acts particularly on cerebral circulation, and is used both orally and intravenously for the prevention and treatment of subarachnoid hemorrhage from ruptured intracranial aneurysm.

Nimodipine: A calcium channel blockader with preferential cerebrovascular activity. It has marked cerebrovascular dilating effects and lowers blood pressure.
2-methoxyethyl ester;
C-nitro compound;
dicarboxylic acids and O-substituted derivatives;
diester;
dihydropyridine;
isopropyl ester
antihypertensive agent;
calcium channel blocker;
cardiovascular drug;
vasodilator agent
nitrendipinenitrendipine : A dihydropyridine that is 1,4-dihydropyridine substituted by methyl groups at positions 2 and 6, a 3-nitrophenyl group at position 4, a ethoxycarbonyl group at position 3 and a methoxycarbonyl group at position 5. It is a calcium-channel blocker used in the treatment of hypertension.

Nitrendipine: A calcium channel blocker with marked vasodilator action. It is an effective antihypertensive agent and differs from other calcium channel blockers in that it does not reduce glomerular filtration rate and is mildly natriuretic, rather than sodium retentive.
C-nitro compound;
dicarboxylic acids and O-substituted derivatives;
diester;
dihydropyridine;
ethyl ester;
methyl ester
antihypertensive agent;
calcium channel blocker;
geroprotector;
vasodilator agent
masoprocolnordihydroguaretic acid: antioxidant compound found in the creosote bush (Larrea tridentata)catechols;
lignan;
tetrol
antioxidant;
ferroptosis inhibitor;
geroprotector;
plant metabolite
pentobarbitalpentobarbital : A member of the class of barbiturates, the structure of which is that of barbituric acid substituted at C-5 by ethyl and sec-pentyl groups.

Pentobarbital: A short-acting barbiturate that is effective as a sedative and hypnotic (but not as an anti-anxiety) agent and is usually given orally. It is prescribed more frequently for sleep induction than for sedation but, like similar agents, may lose its effectiveness by the second week of continued administration. (From AMA Drug Evaluations Annual, 1994, p236)
barbituratesGABAA receptor agonist
procainamideprocainamide : A benzamide that is 4-aminobenzamide substituted on the amide N by a 2-(diethylamino)ethyl group. It is a pharmaceutical antiarrhythmic agent used for the medical treatment of cardiac arrhythmias.

Procainamide: A class Ia antiarrhythmic drug that is structurally-related to PROCAINE.
benzamidesanti-arrhythmia drug;
platelet aggregation inhibitor;
sodium channel blocker
raloxifeneraloxifene : A member of the class of 1-benzothiophenes that is 1-benzothiophene in which the hydrogens at positions 2, 3, and 6 have been replaced by p-hydroxyphenyl, p-[2-(piperidin-1-yl)ethoxy]benzoyl, and hydroxy groups, respectively.1-benzothiophenes;
aromatic ketone;
N-oxyethylpiperidine;
phenols
bone density conservation agent;
estrogen antagonist;
estrogen receptor modulator
risperidonerisperidone : A member of the class of pyridopyrimidines that is 2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one carrying an additional 2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl group at position 2.

Risperidone: A selective blocker of DOPAMINE D2 RECEPTORS and SEROTONIN 5-HT2 RECEPTORS that acts as an atypical antipsychotic agent. It has been shown to improve both positive and negative symptoms in the treatment of SCHIZOPHRENIA.
1,2-benzoxazoles;
heteroarylpiperidine;
organofluorine compound;
pyridopyrimidine
alpha-adrenergic antagonist;
dopaminergic antagonist;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
H1-receptor antagonist;
psychotropic drug;
second generation antipsychotic;
serotonergic antagonist
sotalolsotalol : A sulfonamide that is N-phenylmethanesulfonamide in which the phenyl group is substituted at position 4 by a 1-hydroxy-2-(isopropylamino)ethyl group. It has both beta-adrenoreceptor blocking (Vaughan Williams Class II) and cardiac action potential duration prolongation (Vaughan Williams Class III) antiarrhythmic properties. It is used (usually as the hydrochloride salt) for the management of ventricular and supraventricular arrhythmias.

Sotalol: An adrenergic beta-antagonist that is used in the treatment of life-threatening arrhythmias.
ethanolamines;
secondary alcohol;
secondary amino compound;
sulfonamide
anti-arrhythmia drug;
beta-adrenergic antagonist;
environmental contaminant;
xenobiotic
sulconazole1-{2-[(4-chlorobenzyl)sulfanyl]-2-(2,4-dichlorophenyl)ethyl}-1H-imidazole : A member of the class of imidazoles that is 1-ethyl-1H-imidazole in which one of the hydrogens of the methyl group is replaced by a (4-chlorobenzyl)sulfanediyl group while a second is replaced by a 2,4-dichlorophenyl group.

sulconazole : A racemate comprising equimolar amounts of (R)- and (S)-sulconazole. An antifungal agent with activity against Candida species, it is used (generally as the nitrate salt) for the topical treatment of fungal skin infections.

sulconazole: RN given refers to cpd with unspecified isomeric designation; structure given in first source
dichlorobenzene;
imidazoles;
monochlorobenzenes;
organic sulfide
sumatriptansumatriptan : A sulfonamide that consists of N,N-dimethyltryptamine bearing an additional (N-methylsulfamoyl)methyl substituent at position 5. Selective agonist for a vascular 5-HT1 receptor subtype (probably a member of the 5-HT1D family). Used (in the form of its succinate salt) for the acute treatment of migraine with or without aura in adults.

Sumatriptan: A serotonin agonist that acts selectively at 5HT1 receptors. It is used in the treatment of MIGRAINE DISORDERS.
sulfonamide;
tryptamines
serotonergic agonist;
vasoconstrictor agent
terfenadineTerfenadine: A selective histamine H1-receptor antagonist devoid of central nervous system depressant activity. The drug was used for ALLERGY but withdrawn due to causing LONG QT SYNDROME.diarylmethane
thioridazinethioridazine : A phenothiazine derivative having a methylsulfanyl subsitituent at the 2-position and a (1-methylpiperidin-2-yl)ethyl] group at the N-10 position.

Thioridazine: A phenothiazine antipsychotic used in the management of PHYCOSES, including SCHIZOPHRENIA.
phenothiazines;
piperidines
alpha-adrenergic antagonist;
dopaminergic antagonist;
EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
first generation antipsychotic;
H1-receptor antagonist;
serotonergic antagonist
benzethonium chloridebenzethonium chloride : A (synthetic) quaternary ammonium salt that is benzyldimethylamine in which the nitrogen is quaternised by a 2-{2-[p-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy}ethyl group, with chloride as the counter-ion. An antiseptic and disinfectant, it is active against a broad spectrum of bacteria, fungi, moulds and viruses.aromatic ether;
chloride salt;
quaternary ammonium salt
antibacterial agent;
antifungal agent;
antiseptic drug;
antiviral agent;
disinfectant
sterogenolcetylpyridinium bromide : A pyridinium salt that has N-hexadecylpyridinium as the cation and bromide as the anion.

hexadecylpyridinium bromide: structure in first source
bromide salt;
pyridinium salt
antiseptic drug;
EC 2.7.11.18 (myosin-light-chain kinase) inhibitor;
surfactant
cytisinealkaloid;
bridged compound;
lactam;
organic heterotricyclic compound;
secondary amino compound
nicotinic acetylcholine receptor agonist;
phytotoxin;
plant metabolite
2,4-pyridinedicarboxylic acidlutidinic acid : A pyridinedicarboxylic acid carrying carboxy groups at positions 2 and 4.pyridinedicarboxylic acid
gentian violetcrystal violet : An organic chloride salt that is the monochloride salt of crystal violet cation. It has been used in creams for the topical treatment of bacterial and fungal infections, being effective against some Gram-positive bacteria (notably Staphylococcus species) and some pathogenic fungi (including Candida species) but use declined following reports of animal carcinogenicity. It has also been used for dying wood, silk, and paper, as well as a histological stain.

Gentian Violet: A dye that is a mixture of violet rosanilinis with antibacterial, antifungal, and anthelmintic properties.
organic chloride saltanthelminthic drug;
antibacterial agent;
antifungal agent;
antiseptic drug;
histological dye
alpha-naphthoflavonealpha-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the h side of flavone. A synthetic compound, it is an inhibitor of aromatase (EC 1.14.14.14).

alpha-naphthoflavone: inhibits P4501A1 and P4501A2; stimulates some activities of P4503A4
extended flavonoid;
naphtho-gamma-pyrone;
organic heterotricyclic compound
aryl hydrocarbon receptor agonist;
aryl hydrocarbon receptor antagonist;
EC 1.14.14.14 (aromatase) inhibitor
4-octylphenol4-octylphenol : A member of the class of phenols that is phenol which is substituted at the para- position by an octyl group.

4-octylphenol: xenoestrogen
phenolsmetabolite;
surfactant;
xenoestrogen
dronabinolDelta(9)-tetrahydrocannabinol : A diterpenoid that is 6a,7,8,10a-tetrahydro-6H-benzo[c]chromene substituted at position 1 by a hydroxy group, positions 6, 6 and 9 by methyl groups and at position 3 by a pentyl group. The principal psychoactive constituent of the cannabis plant, it is used for treatment of anorexia associated with AIDS as well as nausea and vomiting associated with cancer chemotherapy.

Dronabinol: A psychoactive compound extracted from the resin of Cannabis sativa (marihuana, hashish). The isomer delta-9-tetrahydrocannabinol (THC) is considered the most active form, producing characteristic mood and perceptual changes associated with this compound.
benzochromene;
diterpenoid;
phytocannabinoid;
polyketide
cannabinoid receptor agonist;
epitope;
hallucinogen;
metabolite;
non-narcotic analgesic
pimozidepimozide : A member of the class of benzimidazoles that is 1,3-dihydro-2H-benzimidazol-2-one in which one of the nitrogens is substituted by a piperidin-4-yl group, which in turn is substituted on the nitrogen by a 4,4-bis(p-fluorophenyl)butyl group.

Pimozide: A diphenylbutylpiperidine that is effective as an antipsychotic agent and as an alternative to HALOPERIDOL for the suppression of vocal and motor tics in patients with Tourette syndrome. Although the precise mechanism of action is unknown, blockade of postsynaptic dopamine receptors has been postulated. (From AMA Drug Evaluations Annual, 1994, p403)
benzimidazoles;
heteroarylpiperidine;
organofluorine compound
antidyskinesia agent;
dopaminergic antagonist;
first generation antipsychotic;
H1-receptor antagonist;
serotonergic antagonist
terodilinediarylmethane
danazolDanazol: A synthetic steroid with antigonadotropic and anti-estrogenic activities that acts as an anterior pituitary suppressant by inhibiting the pituitary output of gonadotropins. It possesses some androgenic properties. Danazol has been used in the treatment of endometriosis and some benign breast disorders.17beta-hydroxy steroid;
terminal acetylenic compound
anti-estrogen;
estrogen antagonist;
geroprotector
metergolinemetergoline : An ergoline alkaloid that is the N-benzyloxycarbonyl derivative of lysergamine. A 5-HT2 antagonist. Also 5-HT1 antagonist and 5-HT1D ligand. Has moderate affinity for 5-HT6 and high affinity for 5-HT7.

Metergoline: A dopamine agonist and serotonin antagonist. It has been used similarly to BROMOCRIPTINE as a dopamine agonist and also for MIGRAINE DISORDERS therapy.
carbamate ester;
ergoline alkaloid
dopamine agonist;
geroprotector;
serotonergic antagonist
paclitaxelTaxus: Genus of coniferous yew trees or shrubs, several species of which have medicinal uses. Notable is the Pacific yew, Taxus brevifolia, which is used to make the anti-neoplastic drug taxol (PACLITAXEL).taxane diterpenoid;
tetracyclic diterpenoid
antineoplastic agent;
human metabolite;
metabolite;
microtubule-stabilising agent
substance ppeptideneurokinin-1 receptor agonist;
neurotransmitter;
vasodilator agent
halofantrinehalofantrine: used in treatment of mild to moderate acute malariaphenanthrenes
ribavirinRebetron: Rebetron is tradename1-ribosyltriazole;
aromatic amide;
monocarboxylic acid amide;
primary carboxamide
anticoronaviral agent;
antiinfective agent;
antimetabolite;
antiviral agent;
EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor
diltiazemdiltiazem : A 5-[2-(dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate in which both stereocentres have S configuration. A calcium-channel blocker and vasodilator, it is used as the hydrochloride in the management of angina pectoris and hypertension.

Diltiazem: A benzothiazepine derivative with vasodilating action due to its antagonism of the actions of CALCIUM ion on membrane functions.
5-[2-(dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetateantihypertensive agent;
calcium channel blocker;
vasodilator agent
piperacillinpiperacillin : A penicillin in which the substituent at position 6 of the penam ring is a 2-[(4-ethyl-2,3-dioxopiperazin-1-yl)carboxamido]-2-phenylacetamido group.

Piperacillin: Semisynthetic, broad-spectrum, AMPICILLIN derived ureidopenicillin antibiotic proposed for PSEUDOMONAS infections. It is also used in combination with other antibiotics.
penicillin;
penicillin allergen
antibacterial drug
paroxetineparoxetine : A benzodioxole that consists of piperidine bearing 1,3-benzodioxol-5-yloxy)methyl and 4-fluorophenyl substituents at positions 3 and 4 respectively; the (3S,4R)-diastereomer. Highly potent and selective 5-HT uptake inhibitor that binds with high affinity to the serotonin transporter (Ki = 0.05 nM). Ki values are 1.1, 350 and 1100 nM for inhibition of [3H]-5-HT, [3H]-l-NA and [3H]-DA uptake respectively. Displays minimal affinity for alpha1-, alpha2- or beta-adrenoceptors, 5-HT2A, 5-HT1A, D2 or H1 receptors at concentrations below 1000 nM, however displays weak affinity for muscarinic ACh receptors (Ki = 42 nM). Antidepressant and anxiolytic in vivo.

Paroxetine: A serotonin uptake inhibitor that is effective in the treatment of depression.
aromatic ether;
benzodioxoles;
organofluorine compound;
piperidines
antidepressant;
anxiolytic drug;
hepatotoxic agent;
P450 inhibitor;
serotonin uptake inhibitor
bw-755c4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amine: A dual inhibitor of both cyclooxygenase and lipoxygenase pathways. It exerts an anti-inflammatory effect by inhibiting the formation of prostaglandins and leukotrienes. The drug also enhances pulmonary hypoxic vasoconstriction and has a protective effect after myocardial ischemia.
lovastatinlovastatin : A fatty acid ester that is mevastatin carrying an additional methyl group on the carbobicyclic skeleton. It is used in as an anticholesteremic drug and has been found in fungal species such as Aspergillus terreus and Pleurotus ostreatus (oyster mushroom).

Lovastatin: A fungal metabolite isolated from cultures of Aspergillus terreus. The compound is a potent anticholesteremic agent. It inhibits 3-hydroxy-3-methylglutaryl coenzyme A reductase (HYDROXYMETHYLGLUTARYL COA REDUCTASES), which is the rate-limiting enzyme in cholesterol biosynthesis. It also stimulates the production of low-density lipoprotein receptors in the liver.
delta-lactone;
fatty acid ester;
hexahydronaphthalenes;
polyketide;
statin (naturally occurring)
anticholesteremic drug;
antineoplastic agent;
Aspergillus metabolite;
prodrug
tepoxalintepoxalin : A hydroxamic acid obtained by formal condensation of the carboxy group of 3-[5-(4-chlorophenyl)-1-(4-methoxyphenyl)pyrazol-3-yl]propanoic acid with the amino group of N-methylhydroxylamine. It is used in veterinary medicine for the control of pain and inflammation caused by musculoskeletal disorders such as hip dysplasia and arthritis in dogs.aromatic ether;
hydroxamic acid;
monochlorobenzenes;
pyrazoles
antipyretic;
apoptosis inhibitor;
EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor;
immunomodulator;
lipoxygenase inhibitor;
non-narcotic analgesic;
non-steroidal anti-inflammatory drug
sertindolesertindole : A phenylindole that is 1H-indole which is substituted on the nitrogen by a p-chlorophenyl group, at position 5 by chlorine, and at position 3 by a piperidin-4-yl group, which is itself substituted on the nitrogen by a 2-(2-oxoimidazolidin-1-yl)ethyl group.heteroarylpiperidine;
imidazolidinone;
organochlorine compound;
organofluorine compound;
phenylindole
alpha-adrenergic antagonist;
H1-receptor antagonist;
second generation antipsychotic;
serotonergic antagonist
adapaleneadapalene : A naphthoic acid that is CD437 in which the phenolic hydroxy group has been converted to its methyl ether.

Adapalene: A naphthalene derivative that has specificity for RETINOIC ACID RECEPTORS. It is used as a DERMATOLOGIC AGENT for the treatment of ACNE.
adamantanes;
monocarboxylic acid;
naphthoic acid
dermatologic drug;
EC 2.7.11.22 (cyclin-dependent kinase) inhibitor;
non-steroidal anti-inflammatory drug
sparfloxacinfluoroquinolone antibiotic;
N-arylpiperazine;
quinolinemonocarboxylic acid;
quinolone;
quinolone antibiotic
zileuton1-benzothiophenes;
ureas
anti-asthmatic drug;
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
ferroptosis inhibitor;
leukotriene antagonist;
non-steroidal anti-inflammatory drug
mibefradilMibefradil: A benzimidazoyl-substituted tetraline that selectively binds and inhibits CALCIUM CHANNELS, T-TYPE.tetralinsT-type calcium channel blocker
ibutilideibutilide: RN & structure in first source; RN refers to the fumarate saltbenzenes;
organic amino compound
lamivudinemonothioacetal;
nucleoside analogue;
oxacycle;
primary alcohol
allergen;
anti-HBV agent;
antiviral drug;
EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor;
HIV-1 reverse transcriptase inhibitor;
prodrug
duloxetineduloxetine
nelfinavirnelfinavir : An aryl sulfide that is used (as its mesylate salt) for treatment of HIV and also exhibits some anticancer properties.

Nelfinavir: A potent HIV protease inhibitor. It is used in combination with other antiviral drugs in the treatment of HIV in both adults and children.
aryl sulfide;
benzamides;
organic heterobicyclic compound;
phenols;
secondary alcohol;
tertiary amino compound
antineoplastic agent;
HIV protease inhibitor
25-hydroxycholesterol25-hydroxy steroid;
oxysterol
human metabolite
zatebradinebenzazepine
tedisamiltedisamil : A member of the class of diazabicyclononanes that is (1s,5s)-3,7-diazaspiro[bicyclo[3.3.1]nonane-9,1'-cyclopentane] in which the hydrogens at positions 3 and 7 are replaced by cyclopropylmethyl groups. It is a potassium channel blocker and an antiarrhythmic agent currently currently in development for the treatment of atrial fibrillation.
telmisartantelmisartan : A member of the class of benzimidazoles used widely in the treatment of hypertension.

Telmisartan: A biphenyl compound and benzimidazole derivative that acts as an angiotensin II type 1 receptor antagonist. It is used in the management of HYPERTENSION.
benzimidazoles;
biphenyls;
carboxybiphenyl
angiotensin receptor antagonist;
antihypertensive agent;
EC 3.4.15.1 (peptidyl-dipeptidase A) inhibitor;
environmental contaminant;
xenobiotic
uk 68798aromatic ether;
sulfonamide;
tertiary amino compound
anti-arrhythmia drug;
potassium channel blocker
voriconazolevoriconazole : A triazole-based antifungal agent used for the treatment of esophageal candidiasis, invasive pulmonary aspergillosis, and serious fungal infections caused by Scedosporium apiospermum and Fusarium spp. It is an inhibitor of cytochrome P450 2C9 (CYP2C9) and CYP3A4.

Voriconazole: A triazole antifungal agent that specifically inhibits STEROL 14-ALPHA-DEMETHYLASE and CYTOCHROME P-450 CYP3A.
conazole antifungal drug;
difluorobenzene;
pyrimidines;
tertiary alcohol;
triazole antifungal drug
P450 inhibitor
ubenimexubenimex: growth inhibitor
vexibinolsophoraflavanone G : A tetrahydroxyflavanone having a structure of naringenin bearing an additional hydroxyl substituent at position 2' as well as a (2R)-5-methyl-2-(prop-1-en-2-yl)hex-4-en-1-yl (lavandulyl) substituent at position 8'.

vexibinol: flavanol from Sophora; structure in first source; RN given refers to (S-(R*,S*))-isomer
(2S)-flavan-4-one;
4'-hydroxyflavanones;
tetrahydroxyflavanone
antimalarial;
antimicrobial agent;
antioxidant;
plant metabolite
1-(10h-phenothiazin-2-yl)ethanone1-(10H-phenothiazin-2-yl)ethanone: structure in first sourcephenothiazines
nicotine(S)-nicotine : A 3-(1-methylpyrrolidin-2-yl)pyridine in which the chiral centre has S-configuration. The naturally occurring and most active enantiomer of nicotine, isolated from Nicotiana tabacum.3-(1-methylpyrrolidin-2-yl)pyridineanxiolytic drug;
biomarker;
immunomodulator;
mitogen;
neurotoxin;
nicotinic acetylcholine receptor agonist;
peripheral nervous system drug;
phytogenic insecticide;
plant metabolite;
psychotropic drug;
teratogenic agent;
xenobiotic
sr 48968SR 48968: structure given in first source; neurokinin A antagonist; tachykinin receptor antagonist; SR 48965 is the inactive R-enantiomer of SR 48968
senktide
opc 21268OPC 21268: structure given in first source; vasopressin V1 receptor antagonist
sc 41930SC 41930: leukotriene B4 receptor antagonist; structure in first source
paliperidone3-{2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl}-9-hydroxy-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one : A member of the class of pyridopyrimidines that is 9-hydroxy-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one carrying an additional 2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl group at position 2.

paliperidone : A racemate comprising equimolar amounts of (R)- and (S)-paliperidone. Paliperidone is the primary active metabolite of the older antipsychotic risperidone and is used for treatment of schizophrenia.
1,2-benzoxazoles;
heteroarylpiperidine;
organofluorine compound;
pyridopyrimidine;
secondary alcohol
mozavaptanmozavaptan: aquaretic agent; vasopressin V2 receptor antagonist; structure given in first sourcebenzamidesaquaretic
ly 255283LY 255283: structure given in UD; leukotriene B4 antagonistaromatic ketone
neurokinin a(4-10), tyr(5)-trp(6,8,9)-lys(10)-neurokinin A(4-10), Tyr(5)-Trp(6,8,9)-Lys(10)-: tachykinin receptor antagonist
rg 14893RG 14893: structure in first source; leukotriene B4 receptor antagonist
3,5-bis(trifluoromethyl)benzyl n-acetyltryptophan3,5-bis(trifluoromethyl)benzyl N-acetyltryptophan: structure given in first source; substance P and neurokinin receptor antagonist
ivabradineivabradine : A member of the class of benzazepines that is 7,8-dimethoxy-1,3,4,5-tetrahydro-3-benzazepin-2-one in which the amide hydrogen is replaced by a [{[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl}(methyl)amino]propyl} group. Used (as its hydrochloride salt) to treat patients with angina who have intolerance to beta blockers and/or heart failure.

Ivabradine: A benzazepine derivative and selective HYPERPOLARIZATION-ACTIVATED CYCLIC NUCLEOTIDE-GATED CHANNELS inhibitor that lowers the heart rate. It is used in the treatment of CHRONIC STABLE ANGINA in patients unable to take BETA-ADRENERGIC BLOCKERS, and in the treatment of HEART FAILURE.
aromatic ether;
benzazepine;
carbobicyclic compound;
tertiary amino compound
cardiotonic drug
docetaxelhydrate;
secondary alpha-hydroxy ketone
antineoplastic agent
moxifloxacinmoxifloxacin : A quinolone that consists of 4-oxo-1,4-dihydroquinoline-3-carboxylic acid bearing a cyclopropyl substituent at position 1, a fluoro substitiuent at position 6, a (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl group at position 7 and a methoxy substituent at position 8. A member of the fluoroquinolone class of antibacterial agents.

Moxifloxacin: A fluoroquinolone that acts as an inhibitor of DNA TOPOISOMERASE II and is used as a broad-spectrum antibacterial agent.
aromatic ether;
cyclopropanes;
fluoroquinolone antibiotic;
pyrrolidinopiperidine;
quinolinemonocarboxylic acid;
quinolone;
quinolone antibiotic
antibacterial drug
solifenacinisoquinolines
cinacalcetcinacalcet : A secondary amino compound that is (1R)-1-(naphthalen-1-yl)ethanamine in which one of the hydrogens attached to the nitrogen is substituted by a 3-[3-(trifluoromethyl)phenyl]propyl group.(trifluoromethyl)benzenes;
naphthalenes;
secondary amino compound
calcimimetic;
P450 inhibitor
telbivudinepyrimidine 2'-deoxyribonucleosideantiviral drug;
EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor
philanthotoxin 343philanthotoxin 343: structure given in first source (see article's footnote); identical to philanthotoxin 433 except that the number of methylene groups between the respective amine moieties is 3,4,3 instead of 4,3,3N-acyl-amino acid
neurokinin a (4-10), nle(10)-
pyrrolidino-benzylphenoxyethanamine
vareniclinevarenicline : An organic heterotetracyclic compound that acts as a partial agonist for nicotinic cholinergic receptors and is used (in the form of its tartate salt) as an aid to giving up smoking.

Varenicline: A benzazepine derivative that functions as an ALPHA4-BETA2 NICOTINIC RECEPTOR partial agonist. It is used for SMOKING CESSATION.
lixivaptan
ly 293111LY 293111: a leukotriene B4 receptor antagonist; structure given in first sourcearomatic ether
7-(3-(2-(cyclopropylmethyl)-3-methoxy-4-((methylamino)carbonyl)phenoxy)propoxy)-3,4-dihydro-8-propyl-2h-1-benzopyran-2-propanoic acid7-(3-(2-(cyclopropylmethyl)-3-methoxy-4-((methylamino)carbonyl)phenoxy)propoxy)-3,4-dihydro-8-propyl-2H-1-benzopyran-2-propanoic acid: structure in first source; inhibits leukotriene B4 receptors
senicapocsenicapoc: a Gardos channel blocker; structure in first source
sr 142806
lanosterol14alpha-methyl steroid;
3beta-sterol;
tetracyclic triterpenoid
bacterial metabolite;
human metabolite;
mouse metabolite;
plant metabolite;
Saccharomyces cerevisiae metabolite
chondocurine (1beta)-(+-)-isomercurine: structure in first sourcearomatic ether
ritonavirritonavir : An L-valine derivative that is L-valinamide in which alpha-amino group has been acylated by a [(2-isopropyl-1,3-thiazol-4-yl)methyl]methylcarbamoyl group and in which a hydrogen of the carboxamide amino group has been replaced by a (2R,4S,5S)-4-hydroxy-1,6-diphenyl-5-{[(1,3-thiazol-5-ylmethoxy)carbonyl]amino}hexan-2-yl group. A CYP3A inhibitor and antiretroviral drug from the protease inhibitor class used to treat HIV infection and AIDS, it is often used as a fixed-dose combination with another protease inhibitor, lopinavir. Also used in combination with dasabuvir sodium hydrate, ombitasvir and paritaprevir (under the trade name Viekira Pak) for treatment of chronic hepatitis C virus genotype 1 infection as well as cirrhosis of the liver.

Ritonavir: An HIV protease inhibitor that works by interfering with the reproductive cycle of HIV. It also inhibits CYTOCHROME P-450 CYP3A.
1,3-thiazoles;
carbamate ester;
carboxamide;
L-valine derivative;
ureas
antiviral drug;
environmental contaminant;
HIV protease inhibitor;
xenobiotic
oxytocinoxytocin : A cyclic nonapeptide hormone with amino acid sequence CYIQNCPLG that also acts as a neurotransmitter in the brain; the principal uterine-contracting and milk-ejecting hormone of the posterior pituitary. Together with the neuropeptide vasopressin, it is believed to influence social cognition and behaviour.

Oxytocin: A nonapeptide hormone released from the neurohypophysis (PITUITARY GLAND, POSTERIOR). It differs from VASOPRESSIN by two amino acids at residues 3 and 8. Oxytocin acts on SMOOTH MUSCLE CELLS, such as causing UTERINE CONTRACTIONS and MILK EJECTION.
heterodetic cyclic peptide;
peptide hormone
oxytocic;
vasodilator agent
amastatinamastatin : A tetrapeptide comprising (2S,3R)-3-amino-2-hydroxy-5-methylhexanoyl, L-valyl, L-valyl and L-aspartic acid units joined in sequence

amastatin: structure; inhibits aminopeptidase
tetrapeptideEC 3.4.11.* (aminopeptidase) inhibitor;
protease inhibitor
strychninestrychnine : A monoterpenoid indole alkaloid that is strychnidine bearing a keto substituent at the 10-position.

Strychnine: An alkaloid found in the seeds of STRYCHNOS NUX-VOMICA. It is a competitive antagonist at glycine receptors and thus a convulsant. It has been used as an analeptic, in the treatment of nonketotic hyperglycinemia and sleep apnea, and as a rat poison.
monoterpenoid indole alkaloid;
organic heteroheptacyclic compound
avicide;
cholinergic antagonist;
glycine receptor antagonist;
neurotransmitter agent;
rodenticide
quinidinequinidine : A cinchona alkaloid consisting of cinchonine with the hydrogen at the 6-position of the quinoline ring substituted by methoxy.

Quinidine: An optical isomer of quinine, extracted from the bark of the CHINCHONA tree and similar plant species. This alkaloid dampens the excitability of cardiac and skeletal muscles by blocking sodium and potassium currents across cellular membranes. It prolongs cellular ACTION POTENTIALS, and decreases automaticity. Quinidine also blocks muscarinic and alpha-adrenergic neurotransmission.
cinchona alkaloidalpha-adrenergic antagonist;
anti-arrhythmia drug;
antimalarial;
drug allergen;
EC 1.14.13.181 (13-deoxydaunorubicin hydroxylase) inhibitor;
EC 3.6.3.44 (xenobiotic-transporting ATPase) inhibitor;
muscarinic antagonist;
P450 inhibitor;
potassium channel blocker;
sodium channel blocker
saquinavirsaquinavir : An aspartic acid derivative obtained by formal condensation of the primary amino group of (2S,3R)-4-[(3S,4aS,8aS)-3-(tert-butylcarbamoyl)octahydroisoquinolin-2(1H)-yl]-3-hydroxy-1-phenylbutan-2-ylamine with the carboxy group of N(2)(-quinolin-2-ylcarbonyl)-L-asparagine. An inhibitor of HIV-1 protease.

Saquinavir: An HIV protease inhibitor which acts as an analog of an HIV protease cleavage site. It is a highly specific inhibitor of HIV-1 and HIV-2 proteases, and also inhibits CYTOCHROME P-450 CYP3A.
L-asparagine derivative;
quinolines
antiviral drug;
HIV protease inhibitor
linezolidacetamides;
morpholines;
organofluorine compound;
oxazolidinone
antibacterial drug;
protein synthesis inhibitor
e 3040E 3040: a dual inhibitor of 5-lipoxygenase and thromboxane A2 synthetase; structure given in first sourcebenzothiazoles;
organic hydroxy compound;
pyridines;
secondary amino compound
anti-inflammatory drug;
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
uricosuric drug
3-(3-pyridyl)-1-propyl-(2s)-1-(3,3-dimethyl-1,2-dioxopentyl)-2-pyrrolidinecarboxylate
cocainecocaine : A tropane alkaloid obtained from leaves of the South American shrub Erythroxylon coca.

Cocaine: An alkaloid ester extracted from the leaves of plants including coca. It is a local anesthetic and vasoconstrictor and is clinically used for that purpose, particularly in the eye, ear, nose, and throat. It also has powerful central nervous system effects similar to the amphetamines and is a drug of abuse. Cocaine, like amphetamines, acts by multiple mechanisms on brain catecholaminergic neurons; the mechanism of its reinforcing effects is thought to involve inhibition of dopamine uptake.
benzoate ester;
methyl ester;
tertiary amino compound;
tropane alkaloid
adrenergic uptake inhibitor;
central nervous system stimulant;
dopamine uptake inhibitor;
environmental contaminant;
local anaesthetic;
mouse metabolite;
plant metabolite;
serotonin uptake inhibitor;
sodium channel blocker;
sympathomimetic agent;
vasoconstrictor agent;
xenobiotic
diethylstilbestroldiethylstilbestrol : An olefinic compound that is trans-hex-3-ene in which the hydrogens at positions 3 and 4 have been replaced by p-hydroxyphenyl groups.

Diethylstilbestrol: A synthetic nonsteroidal estrogen used in the treatment of menopausal and postmenopausal disorders. It was also used formerly as a growth promoter in animals. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), diethylstilbestrol has been listed as a known carcinogen. (Merck, 11th ed)
olefinic compound;
polyphenol
antifungal agent;
antineoplastic agent;
autophagy inducer;
calcium channel blocker;
carcinogenic agent;
EC 1.1.1.146 (11beta-hydroxysteroid dehydrogenase) inhibitor;
EC 3.6.3.10 (H(+)/K(+)-exchanging ATPase) inhibitor;
endocrine disruptor;
xenoestrogen
deaminooxytocindemoxytocin : A heterodetic cyclic peptide that is the synthetic analog of the peptide hormone oxytocin where the free amino group in the half-cystine residue is replaced by hydrogen. The mechanism of action and pharmacological properties of demoxytocin and oxytocin are similar. The drug affects the permeability of the cell membrane, increasing the content of calcium ions in smooth muscle cells, thereby increasing its contraction. It stimulates the contraction of smooth muscles of the uterus, as well as stimulating the contraction of myoepithelial cells of the mammary gland, and enhances the secretion of milk.heterodetic cyclic peptideoxytocic
8-prenylnaringenin8-prenylnaringenin: a phytogenic antineoplastic agent; structure in first source

sophoraflavanone B : A trihydroxyflavanone that is (S)-naringenin having a prenyl group at position 8.
(2S)-flavan-4-one;
4'-hydroxyflavanones;
trihydroxyflavanone
plant metabolite;
platelet aggregation inhibitor
arginine vasopressinArginine Vasopressin: The predominant form of mammalian antidiuretic hormone. It is a nonapeptide containing an ARGININE at residue 8 and two disulfide-linked cysteines at residues of 1 and 6. Arg-vasopressin is used to treat DIABETES INSIPIDUS or to improve vasomotor tone and BLOOD PRESSURE.

argipressin : The predominant form of mammalian vasopressin (antidiuretic hormone). It is a nonapeptide containing an arginine at residue 8 and two disulfide-linked cysteines at residues of 1 and 6.
vasopressincardiovascular drug;
hematologic agent;
mitogen
s 1033(trifluoromethyl)benzenes;
imidazoles;
pyridines;
pyrimidines;
secondary amino compound;
secondary carboxamide
anticoronaviral agent;
antineoplastic agent;
tyrosine kinase inhibitor
4-methyl-N-(pyridin-4-ylmethyl)benzenesulfonamidesulfonamide
tropisetrontropisetron : An indolyl carboxylate ester obtained by formal condensation of the carboxy group of indole-3-carboxylic acid with the hydroxy group of tropine.

Tropisetron: An indole derivative and 5-HT3 RECEPTOR antagonist that is used for the prevention of nausea and vomiting.
indolyl carboxylic acid
(1S,2R)-2-(octylamino)-1-[4-(propan-2-ylthio)phenyl]-1-propanolalkylbenzene
N4-(3-chlorophenyl)-6-methyl-N2-(phenylmethyl)pyrimidine-2,4-diaminearalkylamine
spiro[1,3-dihydroperimidine-2,1'-cycloheptane]naphthalenes
5-bromo-N-(pyridin-4-ylmethyl)-2-thiophenesulfonamidethiophenes
flunarizineFlunarizine: Flunarizine is a selective calcium entry blocker with calmodulin binding properties and histamine H1 blocking activity. It is effective in the prophylaxis of migraine, occlusive peripheral vascular disease, vertigo of central and peripheral origin, and as an adjuvant in the therapy of epilepsy.diarylmethane
ica-121431ICA-121431: structure in first source
sulindacsulindac : A monocarboxylic acid that is 1-benzylidene-1H-indene which is substituted at positions 2, 3, and 5 by methyl, carboxymethyl, and fluorine respectively, and in which the phenyl group of the benzylidene moiety is substituted at the para position by a methylsulfinyl group. It is a prodrug for the corresponding sulfide, a non-steroidal anti-inflammatory drug, used particularly in the treatment of acute and chronic inflammatory conditions.

Sulindac: A sulfinylindene derivative prodrug whose sulfinyl moiety is converted in vivo to an active NSAID analgesic. Specifically, the prodrug is converted by liver enzymes to a sulfide which is excreted in the bile and then reabsorbed from the intestine. This helps to maintain constant blood levels with reduced gastrointestinal side effects.
monocarboxylic acid;
organofluorine compound;
sulfoxide
analgesic;
antineoplastic agent;
antipyretic;
apoptosis inducer;
EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor;
non-narcotic analgesic;
non-steroidal anti-inflammatory drug;
prodrug;
tocolytic agent
enclomipheneEnclomiphene: The trans or (E)-isomer of clomiphene.
4-acetyl-3,5-dimethyl-1H-pyrrole-2-carboxylic acid (5-methoxycarbonyl-2-furanyl)methyl estercarboxylic ester
5-(2-furanyl)-N-[1-[(2-methylphenyl)methyl]-3-pyrazolyl]-7-(trifluoromethyl)-3-pyrazolo[1,5-a]pyrimidinecarboxamidepyrazolopyrimidine
tamoxifenstilbenoid;
tertiary amino compound
angiogenesis inhibitor;
antineoplastic agent;
bone density conservation agent;
EC 1.2.3.1 (aldehyde oxidase) inhibitor;
EC 2.7.11.13 (protein kinase C) inhibitor;
estrogen antagonist;
estrogen receptor antagonist;
estrogen receptor modulator
dasatinibdasatinib (anhydrous) : An aminopyrimidine that is 2-methylpyrimidine which is substituted at position 4 by the primary amino group of 2-amino-1,3-thiazole-5-carboxylic acid and at position 6 by a 4-(2-hydroxyethyl)piperazin-1-yl group, and in which the carboxylic acid group has been formally condensed with 2-chloro-6-methylaniline to afford the corresponding amide. A multi-targeted kinase inhibitor, it is used, particularly as the monohydrate, for the treatment of chronic, accelerated, or myeloid or lymphoid blast phase chronic myeloid leukemia. Note that the name 'dasatinib' is used to refer to the monohydrate (USAN) as well as to anhydrous dasatinib (INN).

N-(2-chloro-6-methylphenyl)-2-((6-(4-(2-hydroxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-yl)amino)-1,3-thiazole-5-carboxamide: a dasatinib prodrug; structure in first source
1,3-thiazoles;
aminopyrimidine;
monocarboxylic acid amide;
N-(2-hydroxyethyl)piperazine;
N-arylpiperazine;
organochlorine compound;
secondary amino compound;
tertiary amino compound
anticoronaviral agent;
antineoplastic agent;
tyrosine kinase inhibitor
tocainide, (s)-isomer
1-methyl-N-[4-(4-morpholinyl)phenyl]-2-quinoliniminemorpholines
2-phenoxy-N-[5-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3,4-oxadiazol-2-yl]acetamidetetralins
(S)-4',5,7-Trihydroxy-6-prenylflavanoneflavanones
2-(1H-benzimidazol-2-ylthio)-1-[2,5-dimethyl-1-(2-oxolanylmethyl)-3-pyrrolyl]ethanonebenzimidazoles
gl-4
sitagliptinsitagliptin : A triazolopyrazine that exhibits hypoglycemic activity.triazolopyrazine;
trifluorobenzene
EC 3.4.14.5 (dipeptidyl-peptidase IV) inhibitor;
environmental contaminant;
hypoglycemic agent;
serine proteinase inhibitor;
xenobiotic
np 1188091-(4-benzhydrylpiperazin-1-yl)-3,3-diphenylpropan-1-one: an N-type calcium channel blocker; structure in first source
leukotriene b4leukotriene B4 : A leukotriene composed of (6Z,8E,10E,14Z)-icosatetraenoic acid having (5S)- and (12R)-hydroxy substituents. It is a lipid mediator of inflammation that is generated from arachidonic acid via the 5-lipoxygenase pathway.

Leukotriene B4: The major metabolite in neutrophil polymorphonuclear leukocytes. It stimulates polymorphonuclear cell function (degranulation, formation of oxygen-centered free radicals, arachidonic acid release, and metabolism). (From Dictionary of Prostaglandins and Related Compounds, 1990)
dihydroxy monocarboxylic acid;
hydroxy polyunsaturated fatty acid;
leukotriene;
long-chain fatty acid
human metabolite;
mouse metabolite;
plant metabolite;
vasoconstrictor agent
cholecalciferolcalciol : A hydroxy seco-steroid that is (5Z,7E)-9,10-secocholesta-5,7,10(19)-triene in which the pro-S hydrogen at position 3 has been replaced by a hydroxy group. It is the inactive form of vitamin D3, being hydroxylated in the liver to calcidiol (25-hydroxyvitamin D3), which is then further hydroxylated in the kidney to give calcitriol (1,25-dihydroxyvitamin D3), the active hormone.

Cholecalciferol: Derivative of 7-dehydroxycholesterol formed by ULTRAVIOLET RAYS breaking of the C9-C10 bond. It differs from ERGOCALCIFEROL in having a single bond between C22 and C23 and lacking a methyl group at C24.
D3 vitamins;
hydroxy seco-steroid;
seco-cholestane;
secondary alcohol;
steroid hormone
geroprotector;
human metabolite
montelukastmontelukast: a leukotriene D4 receptor antagonistaliphatic sulfide;
monocarboxylic acid;
quinolines
anti-arrhythmia drug;
anti-asthmatic drug;
leukotriene antagonist
cilnidipine2-methoxyethyl ester;
C-nitro compound;
dihydropyridine
antihypertensive agent;
calcium channel blocker;
cardiovascular drug
cyclosporineramihyphin A: one of the metabolites produced by Fusarium sp. S-435; RN given refers to cpd with unknown MFhomodetic cyclic peptideanti-asthmatic drug;
anticoronaviral agent;
antifungal agent;
antirheumatic drug;
carcinogenic agent;
dermatologic drug;
EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor;
geroprotector;
immunosuppressive agent;
metabolite
a 85380A 85380: structure given in first source; A-85380 is the S-enantiomer; A-159470 is the R-enantiomer
3-(2,4-dimethoxybenzylidene)anabaseine3-(2,4-dimethoxybenzylidene)anabaseine: an alpha7nAChR nicotinic receptor agonistdimethoxybenzene
atosibanoligopeptide
deamino arginine vasopressinDeamino Arginine Vasopressin: A synthetic analog of the pituitary hormone, ARGININE VASOPRESSIN. Its action is mediated by the VASOPRESSIN receptor V2. It has prolonged antidiuretic activity, but little pressor effects. It also modulates levels of circulating FACTOR VIII and VON WILLEBRAND FACTOR.heterodetic cyclic peptidediagnostic agent;
renal agent;
vasopressin receptor agonist
l 7458703-((4-(4-chlorophenyl)piperazin-1-yl)methyl)-1H-pyrrolo(2,3-b)pyridine: selective for D(4) receptors; structure in first sourcepiperazines
l 372662L 372662: structure in first source
neurokinin aNeurokinin A: A mammalian neuropeptide of 10 amino acids that belongs to the tachykinin family. It is similar in structure and action to SUBSTANCE P and NEUROKININ B with the ability to excite neurons, dilate blood vessels, and contract smooth muscles, such as those in the BRONCHI.
neurokinin bNeurokinin B: A mammalian neuropeptide of 10 amino acids that belongs to the tachykinin family. It is similar in structure and action to SUBSTANCE P and NEUROKININ A with the ability to excite neurons, dilate blood vessels, and contract smooth muscles, such as those in the URINARY BLADDER and UTERUS.polypeptide
sb 223412SB 223412: SB-223412 is the (S)-(-)-isomer; RN given for (S)-isomer; structure in first source
vinorelbineacetate ester;
methyl ester;
organic heteropentacyclic compound;
organic heterotetracyclic compound;
ring assembly;
vinca alkaloid
antineoplastic agent;
photosensitizing agent
way-151932WAY-151932: structure in first source
su 11248monocarboxylic acid amide;
pyrroles
angiogenesis inhibitor;
antineoplastic agent;
EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor;
immunomodulator;
neuroprotective agent;
vascular endothelial growth factor receptor antagonist
oxiconazoleoxiconazole : An oxime O-ether that is the 2,4-dichlorobenzyl ether of the oxime obtained by formal condensation of hydroxylamine with the carbonyl group of acetopnenone in which the phenyl group is substituted by chlorines at positions 2 and 4, and in which one of the hydrogens of the methyl group is replaced by a 1H-imidazol-1-yl group. An antifungal agent, it is used (generally as the nitrate salt) in creams and powders for the topical treatment of fungal skin infections.

oxiconazole: RN given refers to parent cpd(Z)-isomer; structure given in first source
conazole antifungal drug;
dichlorobenzene;
imidazole antifungal drug;
imidazoles;
oxime O-ether
antiinfective agent
indinavir sulfateIndinavir: A potent and specific HIV protease inhibitor that appears to have good oral bioavailability.dicarboxylic acid diamide;
N-(2-hydroxyethyl)piperazine;
piperazinecarboxamide
HIV protease inhibitor
bleomycinbleomycinantineoplastic agent;
metabolite
ceftriaxone1,2,4-triazines;
1,3-thiazoles;
cephalosporin;
oxime O-ether
antibacterial drug;
drug allergen;
EC 3.5.2.6 (beta-lactamase) inhibitor
gr 94800GR 94800: a selective NK2 heptapeptide antagonist
ginkgolide b
sb 201993(E)-3-((((6-(2-carboxyethenyl)-5-((8-(4-methoxyphenyl)octyl)oxy)-2-pyridinyl)methyl)thio)methyl)benzoic acid: structure given in first source; a competitive LTB(4) receptor antagonist
ono 4057ONO-LB 457: LTB4 receptor antagonist; structure given in first source
ticolubantTicolubant: a leukotriene B4 antagonist
ly 223982LY 223982: RN & structure in first source; leukotriene B4 antagonist
gw 1929GW 1929: activates peroxisome proliferator-activated receptor-gamma; structure in first sourcebenzophenones
sb 222200quinolines
sb 218795SB 218795: structure in first sourcequinolines
tubacintubacin: inhibits histone deacetylase 6; structure in first source1,3-oxazoles
dutasteridedutasteride : An aza-steroid that is inasteride in which the tert-butyl group is replaced by a 2,5-bis(trifluoromethyl)phenyl group. A synthetic 4-azasteroid, dutasteride is a selective inhibitor of both the type 1 and type 2 isoforms of steroid 5alpha-reductase, an intracellular enzyme that converts testosterone to 5alpha-dihydrotestosterone. Dutasteride is used for the treatment of symptomatic benign prostatic hyperplasia in men with an enlarged prostate gland.

Dutasteride: A 5-ALPHA-REDUCTASE INHIBITOR that is reported to inhibit both type-1 and type2 isoforms of the enzyme and is used to treat BENIGN PROSTATIC HYPERPLASIA.
(trifluoromethyl)benzenes;
aza-steroid;
delta-lactam
antihyperplasia drug;
EC 1.3.1.22 [3-oxo-5alpha-steroid 4-dehydrogenase (NADP(+))] inhibitor
l 371257L 371257: structure given in first source
pmx 53
belinostathydroxamic acid;
olefinic compound;
sulfonamide
antineoplastic agent;
EC 3.5.1.98 (histone deacetylase) inhibitor
ith 4012
bastadin 5
a 84543
radafaxineradafaxine: a bupropion metabolite; radafaxine is a (+)-isomer of hydroxybupropion
pnu-282987carbonyl compound;
organohalogen compound
4-(4-fluorophenoxy)benzaldehyde semicarbazone4-(4-fluorophenoxy)benzaldehyde semicarbazone: structure in first source
cp 195543CP 195543: a potent & selective leukotriene B4 antagonist; structure in first source
men 11558
midostaurinmidostaurin : An organic heterooctacyclic compound that is the N-benzoyl derivative of staurosporine.benzamides;
gamma-lactam;
indolocarbazole;
organic heterooctacyclic compound
antineoplastic agent;
EC 2.7.11.13 (protein kinase C) inhibitor
l 772405L 772405: an h5-HT(1D) receptor agonist; structure in first source
zd 6021ZD 6021: structure in first source
cp 105696CP 105696: a leukotriene B4 receptor antagonist; structure in first source
l 368899
men 11420
pexacerfontpyrazolopyridine
ssr 149415
bn 52020
sr 144190SR 144190: structure in first source
dnk 333DNK 333: a dual neurokinin NK1/NK2 receptor antagonist; structure in first source
4-n-butyl-1-(4-(2-methylphenyl)-4-oxo-1-butyl)-piperidine hydrogen chloride
NNC 55-0396 (free base)benzimidazoles;
cyclopropanecarboxylate ester;
organofluorine compound;
tertiary amino compound;
tetralins
angiogenesis inhibitor;
antineoplastic agent;
apoptosis inducer;
neuroprotective agent;
potassium channel blocker;
T-type calcium channel blocker
leucettamine bleucettamine B: a protein kinase inhibitor isolated from the marine sponge Leucetta microraphis; structure in first source
bastadin 4
regorafenib(trifluoromethyl)benzenes;
aromatic ether;
monochlorobenzenes;
monofluorobenzenes;
phenylureas;
pyridinecarboxamide
antineoplastic agent;
hepatotoxic agent;
tyrosine kinase inhibitor
tetrodotoxin
abt-737aromatic amine;
aryl sulfide;
biphenyls;
C-nitro compound;
monochlorobenzenes;
N-arylpiperazine;
N-sulfonylcarboxamide;
secondary amino compound;
tertiary amino compound
anti-allergic agent;
anti-inflammatory agent;
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
pnu-282987
gsk221149aGSK221149A: highly selective oxytocin receptor antagonist; structure in first sourcedipeptide
way 207024
ibodutant6-methylbenzo(b)thiophene-2-carboxylic acid (1-(2-phenyl-((1-(tetrahydropyran-4-ylmethyl)piperidin-4-ylmethyl)carbamoyl)ethylcarbamoyl)cyclophenyl)amide: a tachykinin NK2 receptor antagonist; structure in first source
epelsibanepelsiban: structure in first sourcedipeptide
ubenimexpeptide
cnv1014802vixotrigine: a sodium channel blocker
m 35galanin-(1-13)-bradykinin-(2-9)-amide: a high-affinity galanin receptor antagonist
galantidegalantide: consists of 20-amino acid residues, 12 AA from the N-terminal of galanin and the C-terminal part of Substance P; blocks the galanin-mediated inhibition of glucose-induced insulin secretion; amino acid sequence given in first source
galanin (1-16)galanin (1-16): N-terminal fragment of galanin; agonist at the hippocampal galanin receptor
m40
carbetocincarbetocin : Oxytocin in which the hydrogen on the phenolic hydroxy group is substituted by methyl, the amino group on the cysteine residue is substituted by hydrogen, and the sulfur of the cysteine residue is replaced by a methylene group. A synthetic carba-analogue of oxytocin, it is used to control bleeding after giving birth. Like oxytocin, it causes contraction of the uterus.heterodetic cyclic peptideoxytocic
decarbamylsaxitoxindecarbamoylsaxitoxin : A pyrrolopurine that is 2,6-diiminodecahydropyrrolo[1,2-c]purine carrying an additional hydroxymethyl substituent at position 4 as well as two hydroxy substituents at position 10. A toxin that is isolated from marine dinoflagellates and cyanobacteria and is known to cause paralytic shellfish poisoning.alkaloid;
guanidines;
ketone hydrate;
paralytic shellfish toxin;
primary alcohol;
pyrrolopurine
bacterial metabolite;
marine metabolite;
neurotoxin;
toxin;
xenobiotic
zetekitoxin abzetekitoxin AB: a sodium channel blocker; isolated from the frog Atelopus zeteki; structure in first source
nnc 55-0396NNC 55-0396 dihydrochloride : The dihydrochloride salt of NNC 55-0396. It is a stable analogue of mibefradil and a highly selective T-type calcium channel blocker.

NNC 55-0396: a calcium channel blocker with high selectivity for CaV3 channels over high voltage activated channels; structure in first source
hydrochlorideangiogenesis inhibitor;
antineoplastic agent;
apoptosis inducer;
neuroprotective agent;
potassium channel blocker;
T-type calcium channel blocker
serlopitant
kys 05090
navitoclaxaryl sulfide;
monochlorobenzenes;
morpholines;
N-sulfonylcarboxamide;
organofluorine compound;
piperazines;
secondary amino compound;
sulfone;
tertiary amino compound
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
5-(ethylsulfonyl)-2-(naphthalen-2-yl)benzo(d)oxazoleezutromid: a utrophin upregulator; structure in first source
pf-044189481-(4-fluorobenzoyl)-3-(((6-methoxy-2-naphthyl)oxy)methyl)azetidine-3-carboxylic acid: structure in first source
plx4032aromatic ketone;
difluorobenzene;
monochlorobenzenes;
pyrrolopyridine;
sulfonamide
antineoplastic agent;
B-Raf inhibitor
vasopressin, 1-deamino-4-val-8-arg-
ulixacaltamideZ944: a T-type calcium channel antagonistbenzamides;
monochlorobenzenes;
monofluorobenzenes;
piperidines;
secondary carboxamide
non-narcotic analgesic;
T-type calcium channel blocker
abt-199venetoclax : A member of the class of pyrrolopyridines that is a potent inhibitor of the antiapoptotic protein B-cell lymphoma 2. It is used for treamtment of chronic lymphocytic leukemia with 17p deletion.

venetoclax: A BCL-2 inhibitor with antineoplastic activity that is used in the treatment of CHRONIC LYMPHOCYTIC LEUKEMIA associated with chromosome 17p deletion; structure in first source.
aromatic ether;
C-nitro compound;
monochlorobenzenes;
N-alkylpiperazine;
N-arylpiperazine;
N-sulfonylcarboxamide;
oxanes;
pyrrolopyridine
antineoplastic agent;
apoptosis inducer;
B-cell lymphoma 2 inhibitor
obe001OBE001: an oxytocin receptor antagonist
raltegravir1,2,4-oxadiazole;
dicarboxylic acid amide;
hydroxypyrimidine;
monofluorobenzenes;
pyrimidone;
secondary carboxamide
antiviral drug;
HIV-1 integrase inhibitor
saxitoxinsaxitoxin : An alkaloid isolated from the marine dinoflagellates and cyanobacteria that causes paralytic shellfish poisoning.

Saxitoxin: A compound that contains a reduced purine ring system but is not biosynthetically related to the purine alkaloids. It is a poison found in certain edible mollusks at certain times; elaborated by GONYAULAX and consumed by mollusks, fishes, etc. without ill effects. It is neurotoxic and causes RESPIRATORY PARALYSIS and other effects in MAMMALS, known as paralytic SHELLFISH poisoning.
alkaloid;
carbamate ester;
guanidines;
ketone hydrate;
paralytic shellfish toxin;
pyrrolopurine
cyanotoxin;
marine metabolite;
neurotoxin;
sodium channel blocker;
toxin
ajmaline
clozapineclozapine : A benzodiazepine that is 5H-dibenzo[b,e][1,4]diazepine substituted by a chloro group at position 8 and a 4-methylpiperazin-1-yl group at position 11. It is a second generation antipsychotic used in the treatment of psychiatric disorders like schizophrenia.

Clozapine: A tricylic dibenzodiazepine, classified as an atypical antipsychotic agent. It binds several types of central nervous system receptors, and displays a unique pharmacological profile. Clozapine is a serotonin antagonist, with strong binding to 5-HT 2A/2C receptor subtype. It also displays strong affinity to several dopaminergic receptors, but shows only weak antagonism at the dopamine D2 receptor, a receptor commonly thought to modulate neuroleptic activity. Agranulocytosis is a major adverse effect associated with administration of this agent.
benzodiazepine;
N-arylpiperazine;
N-methylpiperazine;
organochlorine compound
adrenergic antagonist;
dopaminergic antagonist;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
environmental contaminant;
GABA antagonist;
histamine antagonist;
muscarinic antagonist;
second generation antipsychotic;
serotonergic antagonist;
xenobiotic
l 742694L 742694: a neurokinin-1 receptor antagonist; structure given in first source
way 267464