Target type: biologicalprocess
Any process that stops, prevents or reduces the frequency, rate or extent of relaxation of cardiac muscle. [GOC:BHF, GOC:rl, GOC:TermGenie, PMID:19708671]
Negative regulation of relaxation of cardiac muscle is a complex process that involves the coordinated action of multiple proteins and signaling pathways. It is essential for the efficient pumping action of the heart and plays a critical role in maintaining proper heart rate and blood pressure.
**1. Calcium Removal:**
* **Calcium ATPase (SERCA) pump:** This protein actively pumps calcium ions (Ca2+) from the cytoplasm back into the sarcoplasmic reticulum (SR), the intracellular calcium store. This reduction in cytosolic calcium levels is crucial for muscle relaxation.
* **Sodium-calcium exchanger (NCX):** This transporter uses the electrochemical gradient of sodium ions (Na+) to move calcium ions out of the cell.
**2. Phospholamban (PLN):**
* This protein regulates the activity of the SERCA pump. When PLN is phosphorylated, it enhances the activity of SERCA, leading to faster calcium removal and relaxation.
* **Protein Kinase A (PKA) and β-adrenergic signaling:** These pathways activate PLN phosphorylation, promoting relaxation.
**3. Troponin Complex:**
* Upon calcium removal, troponin, a protein complex bound to the thin filament, undergoes a conformational change.
* This change reduces the affinity of the troponin complex for actin, allowing the actin and myosin filaments to detach from each other.
**4. Myosin Light Chain Kinase (MLCK):**
* While not directly involved in relaxation, MLCK regulates the phosphorylation state of myosin light chains.
* In some cardiac muscle types, dephosphorylation of myosin light chains can contribute to relaxation.
**5. Other Factors:**
* **Cardiac Troponin I (cTnI):** Phosphorylation of cTnI can also influence the calcium sensitivity of the troponin complex, impacting relaxation.
* **Nitric Oxide (NO):** NO can enhance relaxation by activating guanylate cyclase, leading to the production of cyclic GMP (cGMP). cGMP can act as a signaling molecule to reduce calcium sensitivity and promote relaxation.
**6. Abnormal Relaxation:**
* **Heart Failure:** In heart failure, the relaxation phase of the cardiac cycle can be impaired due to various factors, including decreased SERCA activity, increased calcium sensitivity, and abnormal calcium handling.
**7. Therapeutic Targets:**
* Drugs that enhance SERCA activity, like levosimendan, can improve cardiac relaxation and contractility in patients with heart failure.
* Targeting PLN phosphorylation can also be a therapeutic strategy to enhance cardiac relaxation.'
"
| Protein | Definition | Taxonomy |
|---|---|---|
| cAMP-specific 3',5'-cyclic phosphodiesterase 4D | A 3,5-cyclic-AMP phosphodiesterase 4D that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q08499] | Homo sapiens (human) |
| cAMP-specific 3',5'-cyclic phosphodiesterase 4B | A 3,5-cyclic-AMP phosphodiesterase 4B that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q07343] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| theophylline | dimethylxanthine | adenosine receptor antagonist; anti-asthmatic drug; anti-inflammatory agent; bronchodilator agent; drug metabolite; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; fungal metabolite; human blood serum metabolite; immunomodulator; muscle relaxant; vasodilator agent | |
| cilostamide | cilostamide: selective inhibitor of cyclic AMP phosphodiesterase & platelet aggregation; structure | quinolines | |
| 5,7-dimethoxycoumarin | 5,7-dimethoxycoumarin: has photobiological activity | coumarins | |
| clioquinol | 5-chloro-7-iodoquinolin-8-ol : A monohydroxyquinoline that is quinolin-8-ol in which the hydrogens at positions 5 and 7 are replaced by chlorine and iodine, respectively. It has antibacterial and atifungal properties, and is used in creams for the treatment of skin infections. It has also been investigated as a chelator of copper and zinc ions for the possible treatment of Alzheimer's disease. Clioquinol: A potentially neurotoxic 8-hydroxyquinoline derivative long used as a topical anti-infective, intestinal antiamebic, and vaginal trichomonacide. The oral preparation has been shown to cause subacute myelo-optic neuropathy and has been banned worldwide. | monohydroxyquinoline; organochlorine compound; organoiodine compound | antibacterial agent; antifungal agent; antimicrobial agent; antineoplastic agent; antiprotozoal drug; chelator; copper chelator |
| denbufylline | denbufylline: structure given in first source | oxopurine | |
| dipyridamole | dipyridamole : A pyrimidopyrimidine that is 2,2',2'',2'''-(pyrimido[5,4-d]pyrimidine-2,6-diyldinitrilo)tetraethanol substituted by piperidin-1-yl groups at positions 4 and 8 respectively. A vasodilator agent, it inhibits the formation of blood clots. Dipyridamole: A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752) | piperidines; pyrimidopyrimidine; tertiary amino compound; tetrol | adenosine phosphodiesterase inhibitor; EC 3.5.4.4 (adenosine deaminase) inhibitor; platelet aggregation inhibitor; vasodilator agent |
| donepezil | 2-[(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 |
| 9-(2-hydroxy-3-nonyl)adenine | 9-(2-hydroxy-3-nonyl)adenine: specific inhibitor of adenosine deaminase | ||
| etazolate | etazolate : A pyrazolopyridine that is 1H-pyrazolo[3,4-b]pyridine which is substituted at positions 1, 4, and 5 by ethyl, 2-isopropylidenehydrazino, and ethoxycarbonyl groups, respectively. A phosphodiesterase IV inhibitor with antidepressant and anxiolytic properties. Etazolate: A potent phosphodiesterase inhibitor proposed as an antipsychotic agent. | ethyl ester; hydrazone; pyrazolopyridine | alpha-secretase activator; antidepressant; antipsychotic agent; anxiolytic drug; GABA agent; neuroprotective agent; phosphodiesterase IV inhibitor |
| fluoxetine | fluoxetine : A racemate comprising equimolar amounts of (R)- and (S)-fluoxetine. A selective serotonin reuptake inhibitor (SSRI), it is used (generally as the hydrochloride salt) for the treatment of depression (and the depressive phase of bipolar disorder), bullimia nervosa, and obsessive-compulsive disorder. Fluoxetine: The first highly specific serotonin uptake inhibitor. It is used as an antidepressant and often has a more acceptable side-effects profile than traditional antidepressants. N-methyl-3-phenyl-3-[4-(trifluoromethyl)phenoxy]propan-1-amine : An aromatic ether consisting of 4-trifluoromethylphenol in which the hydrogen of the phenolic hydroxy group is replaced by a 3-(methylamino)-1-phenylpropyl group. | (trifluoromethyl)benzenes; aromatic ether; secondary amino compound | |
| ibudilast | pyrazolopyridine | ||
| amrinone | amrinone : A 3,4'-bipyridine substituted at positions 5 and 6 by an amino group and a keto function respectively. A pyridine phosphodiesterase 3 inhibitor, it is a drug that may improve the prognosis in patients with congestive heart failure. Amrinone: A positive inotropic cardiotonic (CARDIOTONIC AGENTS) with vasodilator properties, phosphodiesterase 3 inhibitory activity, and the ability to stimulate calcium ion influx into the cardiac cell. | bipyridines | EC 3.1.4.* (phosphoric diester hydrolase) inhibitor |
| 1-methyl-3-isobutylxanthine | 1-Methyl-3-isobutylxanthine: A potent cyclic nucleotide phosphodiesterase inhibitor; due to this action, the compound increases cyclic AMP and cyclic GMP in tissue and thereby activates CYCLIC NUCLEOTIDE-REGULATED PROTEIN KINASES 3-isobutyl-1-methylxanthine : An oxopurine that is xanthine which is substituted at positions 1 and 3 by methyl and isobutyl groups, respectively. | 3-isobutyl-1-methylxanthine | |
| losartan | losartan : A biphenylyltetrazole where a 1,1'-biphenyl group is attached at the 5-position and has an additional trisubstituted imidazol-1-ylmethyl group at the 4'-position Losartan: An antagonist of ANGIOTENSIN TYPE 1 RECEPTOR with antihypertensive activity due to the reduced pressor effect of ANGIOTENSIN II. | biphenylyltetrazole; imidazoles | angiotensin receptor antagonist; anti-arrhythmia drug; antihypertensive agent; endothelin receptor antagonist |
| milrinone | bipyridines; nitrile; pyridone | cardiotonic drug; EC 3.1.4.17 (3',5'-cyclic-nucleotide phosphodiesterase) inhibitor; platelet aggregation inhibitor; vasodilator agent | |
| nimodipine | nimodipine : 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 |
| papaverine | papaverine : A benzylisoquinoline alkaloid that is isoquinoline substituted by methoxy groups at positions 6 and 7 and a 3,4-dimethoxybenzyl group at position 1. It has been isolated from Papaver somniferum. Papaverine: An alkaloid found in opium but not closely related to the other opium alkaloids in its structure or pharmacological actions. It is a direct-acting smooth muscle relaxant used in the treatment of impotence and as a vasodilator, especially for cerebral vasodilation. The mechanism of its pharmacological actions is not clear, but it apparently can inhibit phosphodiesterases and it may have direct actions on calcium channels. | benzylisoquinoline alkaloid; dimethoxybenzene; isoquinolines | antispasmodic drug; vasodilator agent |
| pentoxifylline | oxopurine | ||
| 4-(3-butoxy-4-methoxybenzyl)-2-imidazolidinone | 4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinone: Inhibitor of phosphodiesterases. | methoxybenzenes | |
| rolipram | pyrrolidin-2-ones | antidepressant; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor | |
| streptonigrin | pyridines; quinolone | antimicrobial agent; antineoplastic agent | |
| thalidomide | 2-(2,6-dioxopiperidin-3-yl)-1H-isoindole-1,3(2H)-dione : A dicarboximide that is isoindole-1,3(2H)-dione in which the hydrogen attached to the nitrogen is substituted by a 2,6-dioxopiperidin-3-yl group. thalidomide : A racemate comprising equimolar amounts of R- and S-thalidomide. Thalidomide: A piperidinyl isoindole originally introduced as a non-barbiturate hypnotic, but withdrawn from the market due to teratogenic effects. It has been reintroduced and used for a number of immunological and inflammatory disorders. Thalidomide displays immunosuppressive and anti-angiogenic activity. It inhibits release of TUMOR NECROSIS FACTOR-ALPHA from monocytes, and modulates other cytokine action. | phthalimides; piperidones | |
| tofisopam | tofisopam: structure; dextofisopam is the R-enantiomer of tofisopam & antidiarrheal | organic molecular entity | |
| trequinsin | trequinsin: RN given refers to parent cpd; structure given in first source | pyridopyrimidine | |
| zardaverine | zardaverine : A pyridazinone derivative in which pyridazin-3(2H)-one is substituted at C-6 with a 4-(difluoromethoxy)-3-methoxyphenyl group. It is a phosphodiesterase inhibitor, selective for PDE3 and 4. zardaverine: structure given in first source | organofluorine compound; pyridazinone | anti-asthmatic drug; bronchodilator agent; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; peripheral nervous system drug |
| 1-hydroxyphthalazine | 1-hydroxyphthalazine: RN given refers to cpd with unspecified locants; do not confuse with cpd phthalazinol RN: 56611-65-5 | phthalazines | |
| 9-benzyladenine | |||
| 8-bromo cyclic adenosine monophosphate | 8-Br-cAMP : A 3',5'-cyclic purine nucleotide that is 3',5'-cyclic AMP bearing an additional bromo substituent at position 8 on the adenine ring. An activator of cyclic AMP-dependent protein kinase, but resistant to degradation by cyclic AMP phosphodiesterase. 8-Bromo Cyclic Adenosine Monophosphate: A long-acting derivative of cyclic AMP. It is an activator of cyclic AMP-dependent protein kinase, but resistant to degradation by cyclic AMP phosphodiesterase. | 3',5'-cyclic purine nucleotide; adenyl ribonucleotide; organobromine compound | antidepressant; protein kinase agonist |
| cartazolate | cartazolate: structure | ||
| enoximone | Enoximone: A selective phosphodiesterase inhibitor with vasodilating and positive inotropic activity that does not cause changes in myocardial oxygen consumption. It is used in patients with CONGESTIVE HEART FAILURE. | aromatic ketone | |
| imazodan | imazodan: RN & structure given in first source; | ||
| tolafentrine | tolafentrine: a mixed-type phosphodiesterase (PDE) III/IV inhibitor | ||
| nitraquazone | nitraquazone: structure given in first source | ||
| cipamfylline | cipamfylline: a PDE type-4 inhibitor | oxopurine | |
| ethyl 3-amino-1h-pyrazole-4-carboxylate | ethyl 3-amino-1H-pyrazole-4-carboxylate: structure in first source | ||
| 8-((4-chlorophenyl)thio)cyclic-3',5'-amp | 8-((4-chlorophenyl)thio)cyclic-3',5'-AMP: lowers cAMP in heart & fat cells; cAMP-dependent kinase inhibitor 8-(4-chlorophenylthio)-cAMP : A 3',5'-cyclic purine nucleotide that is 3',5'-cyclic AMP in which the hydrogen at position 2 on the purine fragment is replaced by a 4-chlorophenylthio group. | 3',5'-cyclic purine nucleotide; adenyl ribonucleotide; aryl sulfide; organochlorine compound | protein kinase agonist |
| 8-thio-benzyl cyclic amp | 8-thio-benzyl cyclic AMP: RN given refers to parent cpd | ||
| 8-chloro-cyclic adenosine monophosphate | |||
| tadalafil | benzodioxoles; pyrazinopyridoindole | EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor; vasodilator agent | |
| 4-phenylpyrrolidone-2 | |||
| cdp 840 | |||
| 7-benzylamino-6-chloro-2-piperazino-4-pyrrolidinopteridine | 7-benzylamino-6-chloro-2-piperazino-4-pyrrolidinopteridine: inibits growth of B16 melanoma & MCF-7 mammary carcinoma cells | ||
| 9-(2-hydroxy-3-nonyl)adenine | (2R,3S)-EHNA : EHNA of absolute configuration 2R,3S. Selective inhibitor of cGMP-stimulated phosphodiesterase (PDE2) (IC50 = 0.8 - 4 mM). Also a potent inhibitor of adenosine deaminase. | EHNA | EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; EC 3.5.4.4 (adenosine deaminase) inhibitor |
| 9-(2-hydroxy-3-nonyl)adenine | (2S,3R)-EHNA : EHNA of absolute configuration 2S,3R. | EHNA | |
| cilomilast | methoxybenzenes | ||
| rp 73401 | piclamilast : A monocarboxylic acid amide resulting from the formal condensation of the carboxy group of 3-(cyclopentyloxy)-4-methoxybenzoic acid with the primary amino group of 3,5-dichloropyridin-4-amine. piclamilast: an antiasthmatic agent and phosphodiesterase 4 inhibitor; structure in first source | aromatic ether; benzamides; chloropyridine; monocarboxylic acid amide | anti-asthmatic drug; anti-inflammatory agent; bronchodilator agent; phosphodiesterase IV inhibitor |
| moracin c | benzofurans | ||
| (+)-rolipram | (+)-rolipram : The (S)-enantiomer of rolipram. | rolipram | |
| n(6)-benzyl-cyclic adenosine 5'-monophosphate | |||
| betulinan a | betulinan A: a lipid peroxidation inhibitor; from Lenzites betulina; structure given in first source | ||
| moracin m | moracin M: has been isolated from Morus alba L.; structure in first source | benzofurans | |
| mesembrenone | mesembrenone: a psychoactive compound isolated from Sceletium tortuosum; structure in first source | pyrrolidines | |
| resveratrol | trans-resveratrol : A resveratrol in which the double bond has E configuration. | resveratrol | antioxidant; phytoalexin; plant metabolite; quorum sensing inhibitor; radical scavenger |
| cocaine | cocaine : 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 |
| rolipram | (-)-rolipram : The (R)-enantiomer of rolipram. | rolipram | |
| mesopram | mesopram: a potent & selective type IV phosphodiesterase inhibitor | ||
| roflumilast | aromatic ether; benzamides; chloropyridine; cyclopropanes; organofluorine compound | anti-asthmatic drug; phosphodiesterase IV inhibitor | |
| cyclic nucleotide phosphodiesterases, type 4 | |||
| hc 030031 | 2-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl)-N-(4-isopropylphenyl)acetamide: a TRPA1 channel blocker | ||
| eggmanone | eggmanone: a phosphodiesterase-4 inhibitor; structure in first source | ||
| 3-(n,n-dimethylsulfonamido)-4-methyl-nitrobenzene | BRL-50481 : A C-nitro compound that is benzene substituted by N,N-dimethylaminosulfonyl, methyl and nitro groups at positions 1, 2 and 5, respectively. It is a phosphodiesterase inhibitor selective for the PDE7 subtype (Ki = 180 nM). | C-nitro compound; sulfonamide; toluenes | bone density conservation agent; EC 3.1.4.53 (3',5'-cyclic-AMP phosphodiesterase) inhibitor; geroprotector |
| 4,5-dihydro-6-(4-(imidazol-1-yl)phenyl)-5-methyl-3(2h)-pyridazinone | 4,5-dihydro-6-(4-(imidazol-1-yl)phenyl)-5-methyl-3(2H)-pyridazinone: RN & structure given in first source | ||
| tetomilast | |||
| mangostin | alpha-mangostin : A member of the class of xanthones that is 9H-xanthene substituted by hydroxy group at positions 1, 3 and 6, a methoxy group at position 7, an oxo group at position 9 and prenyl groups at positions 2 and 8. Isolated from the stems of Cratoxylum cochinchinense, it exhibits antioxidant, antimicrobial and antitumour activities. mangostin: xanthone from rind of Garcinia mangostana Linn. fruit | aromatic ether; phenols; xanthones | antimicrobial agent; antineoplastic agent; antioxidant; plant metabolite |
| morusin | morusin : An extended flavonoid that is flavone substituted by hydroxy groups at positions 5, 2' and 4', a prenyl group at position 3 and a 2,2-dimethyl pyran group across positions 7 and 8. morusin: from Morus root bark; structure given in first source | extended flavonoid; trihydroxyflavone | antineoplastic agent; plant metabolite |
| pterostilbene | diether; methoxybenzenes; stilbenol | anti-inflammatory agent; antineoplastic agent; antioxidant; apoptosis inducer; hypoglycemic agent; neuroprotective agent; neurotransmitter; plant metabolite; radical scavenger | |
| indolidan | indolidan: structure given in first source | ||
| cudraflavone c | cudraflavone C : A tetrahydroxyflavone that is flavone substituted by hydroxy groups at positions 5, 7, 2' and 4' and prenyl groups at positions 3 and 6. Isolated from Morus nigra, it exhibits antibacterial and cytotoxic activities. cudraflavone C: a tyrosinase inhibitor with antimicrobial activity; isolated from Artocarpus integer; structure in first source | tetrahydroxyflavone | antibacterial agent; antineoplastic agent; plant metabolite |
| fosbretabulin | stilbenoid | ||
| 3,4',5-trimethoxystilbene | 3,4',5-trimethoxystilbene: structure in first source | ||
| 9-Hydroxycalabaxanthone | xanthones | ||
| sch 351591 | SCH 351591: a phosphodiesterase 4 inhibitor; structure in first source SCH-351591 : An aromatic amide resulting from the formal condensation of the carboxy group of 8-methoxy-2-(trifluoromethyl)quinoline-5-carboxylic acid with the primary amino group of 3,5-dichloropyridin-4-amine 1-oxide. It is a potent inhibitor of phosphodiesterase IV (PDE4). | ||
| rs 14203 | RS 14203: a type IV cyclic nucleotide phosphodiesterase inhibitor; structure in first source | ||
| gsk 256066 | |||
| ci 1044 | CI 1044: inhibits PDE4; structure in first source | ||
| l-454,560 | L-454,560: Phosphodiesterase Inhibitor; structure in first source | ||
| t 1032 | T 1032: a cyclic GMP phosphodiesterase-5 inhibitor; structure in first source | ||
| l-826,141 | L-826,141: structure in first source | ||
| 4-n-butyl-1-(4-(2-methylphenyl)-4-oxo-1-butyl)-piperidine hydrogen chloride | |||
| 8-(methylthio)cyclic 3',5'-adenosine monophosphate | 8-(methylthio)cyclic 3',5'-adenosine monophosphate: structure | ||
| licoflavone c | licoflavone C: Antimutagenic Agent; a naturally occurring prenyl-flavone extracted from Genista ephedroides; structure in first source | ||
| oglemilast | oglemilast: a PDE4 inhibitor and NSAID; no further info available 1/2006 | ||
| apremilast | aromatic ether; N-acetylarylamine; phthalimides; sulfone | non-steroidal anti-inflammatory drug; phosphodiesterase IV inhibitor | |
| f-amidine | F-amidine: structure in first source | N-acylglycine | |
| 8-benzylthio-n(6)-n-butyladenosine cyclic-3,5'-monophosphate | 8-benzylthio-N(6)-n-butyladenosine cyclic-3,5'-monophosphate: may be useful as myocardial stimulant; structure given in first source | ||
| lyoniside | lyoniside: see also eleutherosides & syringin for eleutheroside B: 118-34-3; RN given refers to (3beta)-isomer | ||
| pf 04217903 | quinolines | ||
| 3-(2,5-dimethoxyphenyl)-6-(3,4-dimethoxyphenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine | triazoles | ||
| n-alpha-benzoyl-n5-(2-chloro-1-iminoethyl)-l-ornithine amide | benzenes | ||
| nitd 609 | NITD 609: an antimalarial and coccidiostat; structure in first source | ||
| an2728 | crisaborole : A member of the class of benzoxaboroles that is 5-hydroxy-1,3-dihydro-2,1-benzoxaborole in which the phenolic hydrogen has been replaced by a 4-cyanophenyl group. A phosphodiesterase 4 inhibitor that is used for treatment of mild to moderate atopic dermatitis in children and adults. crisaborole: NSAID, Dermatologic Agent; structure in first source | aromatic ether; benzoxaborole; nitrile | antipsoriatic; non-steroidal anti-inflammatory drug; phosphodiesterase IV inhibitor |
| bms-911543 | N,N-dicyclopropyl-4-((1,5-dimethyl-1H-pyrazol-3-yl)amino)-6-ethyl-1-methyl-1,6-dihydroimidazo(4,5-d)pyrrolo(2,3b)pyridine-7-carboxamide: has antineoplastic activity; structure in first source | ||
| gsk1210151a | GSK1210151A: inhibitor of the BET family of proteins; structure in first source | imidazoquinoline | |
| d159687 | |||
| chf6001 | tanimilast: a phosphodiesterase-4 inhibitor; structure in first source | ||
| sildenafil | sildenafil : A pyrazolo[4,3-d]pyrimidin-7-one having a methyl substituent at the 1-position, a propyl substituent at the 3-position and a 2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl group at the 5-position. | piperazines; pyrazolopyrimidine; sulfonamide | EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor; vasodilator agent |
| zaprinast | zaprinast: anaphylaxis inhibitor; structure | triazolopyrimidines | |
| vardenafil | vardenafil : The sulfonamide resulting from formal condensation of the sulfo group of 4-ethoxy-3-(5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(1H)-one-2-yl)benzenesulfonic acid and the secondary amino group of 4-ethylpiperazine. | imidazotriazine; N-alkylpiperazine; N-sulfonylpiperazine | EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; vasodilator agent |
| Imidazosagatriazinone | pyrazolopyrimidine | ||
| pelrinone | pelrinone: structure given in first source | ||
| lixazinone | lixazinone: structure given in first source |