Page last updated: 2024-10-24

lipoxin biosynthetic process

Definition

Target type: biologicalprocess

The chemical reactions and pathways resulting in the formation of a lipoxin. A lipoxin is a non-classic eicosanoid and signaling molecule that has four conjugated double bonds and is derived from arachidonic acid. [GOC:mw]

Lipoxins are specialized pro-resolving mediators (SPMs) derived from arachidonic acid through the action of lipoxygenases (LOXs). The biosynthesis of lipoxins involves a complex interplay of enzymatic reactions and cell-cell interactions. Here's a detailed description:

**1. Initial Steps:**

* **Arachidonic Acid Release:** The process begins with the release of arachidonic acid from membrane phospholipids by phospholipase A2 (PLA2) enzymes.
* **5-LOX Activity:** 5-lipoxygenase (5-LOX), an enzyme primarily found in leukocytes, acts on arachidonic acid to produce 5-hydroperoxyeicosatetraenoic acid (5-HPETE).

**2. Formation of 15-epi-Lipoxins:**

* **15-LOX Activity:** 15-lipoxygenase (15-LOX), predominantly expressed in platelets, converts 5-HPETE into 15-hydroxyeicosatetraenoic acid (15-HETE). This step can occur within the same cell as the initial 5-LOX activity.
* **Transcellular Biosynthesis:** Alternatively, 15-HETE can be produced in a different cell, such as a platelet, and transferred to a leukocyte, where it undergoes further processing.
* **LXA4 Formation:** Leukocytes possess a unique enzyme called leukotriene A4 hydrolase (LTA4H). This enzyme can act on 15-HETE to produce lipoxin A4 (LXA4).

**3. Formation of 15-epi-Lipoxins:**

* **LXA4 Conversion:** The leukocyte enzyme 5-LOX can further process LXA4, converting it into 15-epi-LXA4.

**4. Formation of Lipoxins B4 and E4:**

* **Lipoxins B4 (LXB4) and E4 (LXE4):** These lipoxins are generated from LXA4 by specific dehydrogenase enzymes.

**5. Regulation and Modulation:**

* **Cell-Cell Interactions:** The biosynthesis of lipoxins is often influenced by cell-cell interactions, including interactions between leukocytes, platelets, and endothelial cells.
* **Modulation by Other Mediators:** Other inflammatory mediators, such as leukotrienes and prostaglandins, can influence the production of lipoxins.
* **Role of Cytokines:** Cytokines like TNF-α can modulate lipoxin production, contributing to the overall inflammatory response.

**Key Features of Lipoxin Biosynthesis:**

* **Transcellular Metabolism:** Lipoxin biosynthesis often involves the participation of multiple cell types, highlighting the importance of cell-cell interactions.
* **Unique Enzymes:** The biosynthesis of lipoxins relies on specific enzymes, including 5-LOX, 15-LOX, and LTA4H, which are expressed in distinct cell types.
* **Complex Regulation:** The production of lipoxins is subject to a delicate balance of regulatory mechanisms, ensuring appropriate levels of these mediators in response to inflammation and tissue injury.'
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Proteins (1)

ProteinDefinitionTaxonomy
Polyunsaturated fatty acid 5-lipoxygenaseA polyunsaturated fatty acid 5-lipoxygenase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P09917]Homo sapiens (human)

Compounds (161)

CompoundDefinitionClassesRoles
aa 8612,3,5-trimethyl-6-(12-hydroxy-5,10-dodecadiynyl)-1,4-benzoquinone: structure given in first source

docebenone : A member of the class of benzoquinones that is p-benzoquinone in which the hydrogens are substituted by three methyl groups and a 12-hydroxydodeca-5,10-diyn-1-yl group.
1,4-benzoquinones;
acetylenic compound;
primary alcohol
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
ferroptosis inhibitor
acetazolamideAcetazolamide: One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)monocarboxylic acid amide;
sulfonamide;
thiadiazoles
anticonvulsant;
diuretic;
EC 4.2.1.1 (carbonic anhydrase) inhibitor
anthralinanthralin : An anthracene compound derived by the substitution of -OH groups for hydrogen at C-1 and C-8, and with an oxo group at C-9.

Anthralin: An anthracene derivative that disrupts MITOCHONDRIA function and structure and is used for the treatment of DERMATOSES, especially PSORIASIS. It may cause FOLLICULITIS.
anthracenesantipsoriatic
celecoxiborganofluorine compound;
pyrazoles;
sulfonamide;
toluenes
cyclooxygenase 2 inhibitor;
geroprotector;
non-narcotic analgesic;
non-steroidal anti-inflammatory drug
chloroxinechloroxine : A monohydroxyquinoline that is quinolin-8-ol in which the hydrogens at positions 5 and 7 have been substituted by chlorine. A synthetic antibacterial prepared by chlorination of quinolin-8-ol, it is used for the treatment of dandruff and seborrhoeic dermatitis of the scalp.monohydroxyquinoline;
organochlorine compound
antibacterial agent;
antifungal drug;
antiseborrheic
embelinembelin : A member of the class of dihydroxy-1,4-benzoquinones that is 2,5-dihydroxy-1,4-benzoquinone which is substituted by an undecyl group at position 3. Isolated from Lysimachia punctata and Embelia ribes, it exhibits antimicrobial, antineoplastic and inhibitory activity towards hepatitis C protease.

embelin: from Embelia fruit (Myrsinaceae)
dihydroxy-1,4-benzoquinonesantimicrobial agent;
antineoplastic agent;
hepatitis C protease inhibitor;
plant metabolite
2,5-dihydroxybenzoic acid2,5-dihydroxybenzoic acid : A dihydroxybenzoic acid having the two hydroxy groups at the 2- and 5-positions.

2,5-dihydroxybenzoic acid: RN given refers to parent cpd; a oxidative product of saligenin
dihydroxybenzoic acidEC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor;
fungal metabolite;
human metabolite;
MALDI matrix material;
mouse metabolite
hexylresorcinolresorcinols
idebenone1,4-benzoquinones;
primary alcohol
antioxidant;
ferroptosis inhibitor
indirubin-3'-monoximeindirubin-3'-monoxime : A member of the class of biindoles that is indirubin in which the keto group at position 3' has undergone condensation with hydroxylamine to form the corresponding oxime.

indirubin-3'-monoxime: has antiangiogenic activity
ketotifenketotifen : An organic heterotricyclic compound that is 4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one which is substituted at position 4 by a 1-methylpiperidin-4-ylidene group. A blocker of histamine H1 receptors with a stabilising action on mast cells, it is used (usually as its hydrogen fumarate salt) for the treatment of asthma, where it may take several weeks to exert its full effect.

Ketotifen: A cycloheptathiophene blocker of histamine H1 receptors and release of inflammatory mediators. It has been proposed for the treatment of asthma, rhinitis, skin allergies, and anaphylaxis.
cyclic ketone;
olefinic compound;
organic heterotricyclic compound;
organosulfur heterocyclic compound;
piperidines;
tertiary amino compound
anti-asthmatic drug;
H1-receptor antagonist
ly 171883LY 171883: structure in first source; leukotriene receptor antagonist

tomelukast : A member of the class of acetophenones that is 1-phenylethanone substituted at position 2 by a hydroxy group, a propyl group at position 3 and a 4-(1H-tetrazol-5-yl)butoxy group at position 4. A leukotriene antagonist, it exhibits anti-asthmatic activity.
acetophenones;
aromatic ether;
phenols;
tetrazoles
anti-asthmatic drug;
leukotriene antagonist
4-(dimethylamino)-n-(7-(hydroxyamino)-7-oxoheptyl)benzamide4-(dimethylamino)-N-(7-(hydroxyamino)-7-oxoheptyl)benzamide: structure in first source

4-(dimethylamino)-N-[7-(hydroxyamino)-7-oxoheptyl]benzamide : A benzamide resulting from the formal condensation of the carboxy group of 4-(dimethylamino)benzoic acid with the amino group of 7-amino-N-hydroxyheptanamide. It is a potent inhibitor of histone deacetylases and induces cell cycle arrest and apoptosis in several human cancer cell lines.
benzamides;
hydroxamic acid;
secondary carboxamide;
tertiary amino compound
antineoplastic agent;
apoptosis inducer;
EC 3.5.1.98 (histone deacetylase) inhibitor
meclofenamic acid(1-)meclofenamic acid(1-) : A monocarboxylic acid anion resulting from the removal of the proton from the carboxy group of meclofenamic acid. The major species at pH 7.3.monocarboxylic acid anion
masoprocolnordihydroguaretic acid: antioxidant compound found in the creosote bush (Larrea tridentata)catechols;
lignan;
tetrol
antioxidant;
ferroptosis inhibitor;
geroprotector;
plant metabolite
n-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamideN-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamide: structure given in first source

NS-398 : A C-nitro compound that is N-methylsulfonyl-4-nitroaniline bearing an additional cyclohexyloxy substituent at position 2.
aromatic ether;
C-nitro compound;
sulfonamide
antineoplastic agent;
cyclooxygenase 2 inhibitor
pd 158780aromatic amine;
bromobenzenes;
diamine;
pyridopyrimidine;
secondary amino compound
antineoplastic agent;
EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor
pf 5901alpha-pentyl-3-(2-quinolinylmethoxy)benzenemethanol: structure given in first source; platelet activating factor antagonistquinolines
rofecoxibbutenolide;
sulfone
analgesic;
cyclooxygenase 2 inhibitor;
non-steroidal anti-inflammatory drug
vorinostatvorinostat : A dicarboxylic acid diamide comprising suberic (octanedioic) acid coupled to aniline and hydroxylamine. A histone deacetylase inhibitor, it is marketed under the name Zolinza for the treatment of cutaneous T cell lymphoma (CTCL).

Vorinostat: A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME.
dicarboxylic acid diamide;
hydroxamic acid
antineoplastic agent;
apoptosis inducer;
EC 3.5.1.98 (histone deacetylase) inhibitor
triclosanaromatic ether;
dichlorobenzene;
monochlorobenzenes;
phenols
antibacterial agent;
antimalarial;
drug allergen;
EC 1.3.1.9 [enoyl-[acyl-carrier-protein] reductase (NADH)] inhibitor;
EC 1.5.1.3 (dihydrofolate reductase) inhibitor;
fungicide;
persistent organic pollutant;
xenobiotic
zonisamidezonisamide : A 1,2-benzoxazole compound having a sulfamoylmethyl substituent at the 3-position.

Zonisamide: A benzisoxazole and sulfonamide derivative that acts as a CALCIUM CHANNEL blocker. It is used primarily as an adjunctive antiepileptic agent for the treatment of PARTIAL SEIZURES, with or without secondary generalization.
1,2-benzoxazoles;
sulfonamide
anticonvulsant;
antioxidant;
central nervous system drug;
protective agent;
T-type calcium channel blocker
thymidinepyrimidine 2'-deoxyribonucleosideEscherichia coli metabolite;
human metabolite;
metabolite;
mouse metabolite
cycloheximidecycloheximide : A dicarboximide that is 4-(2-hydroxyethyl)piperidine-2,6-dione in which one of the hydrogens attached to the carbon bearing the hydroxy group is replaced by a 3,5-dimethyl-2-oxocyclohexyl group. It is an antibiotic produced by the bacterium Streptomyces griseus.

Cycloheximide: Antibiotic substance isolated from streptomycin-producing strains of Streptomyces griseus. It acts by inhibiting elongation during protein synthesis.
antibiotic fungicide;
cyclic ketone;
dicarboximide;
piperidine antibiotic;
piperidones;
secondary alcohol
anticoronaviral agent;
bacterial metabolite;
ferroptosis inhibitor;
neuroprotective agent;
protein synthesis inhibitor
phenidonephenidone: photographic developer; RN given refers to parent cpd; structure
1,3-ditolylguanidine1,3-ditolylguanidine: structure given in first source; a selective ligand for the sigma binding sites in the braintoluenes
thymidine monophosphatedTMP : The neutral species of thymidine 5'-monophosphate (2'-deoxythymidine 5'-monophosphate).

Thymidine Monophosphate: 5-Thymidylic acid. A thymine nucleotide containing one phosphate group esterified to the deoxyribose moiety.
thymidine 5'-monophosphatefundamental metabolite
glycyrrhetinic acidcyclic terpene ketone;
hydroxy monocarboxylic acid;
pentacyclic triterpenoid
immunomodulator;
plant metabolite
ostholosthol: from Cnidium monnieri and Angelica pubescens (both Apiaceae); structure given in first sourcebotanical anti-fungal agent;
coumarins
metabolite
allyl sulfideallyl sulfide: essence of garlic; inhibits CYP2E1organic sulfide
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.
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
zileuton1-benzothiophenes;
ureas
anti-asthmatic drug;
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
ferroptosis inhibitor;
leukotriene antagonist;
non-steroidal anti-inflammatory drug
tebufelonetebufelone: structure given in first source
mk 0591MK 0591: structure given in first source; MK 0591 was previously L-686,708; inhibits leukotriene biosynthesis by inhibiting 5-lipoxygenase activating protein
4-[1-[4-[2-(dimethylamino)ethoxy]phenyl]-2-phenylbut-1-enyl]phenolstilbenoid
ursolic acidhydroxy monocarboxylic acid;
pentacyclic triterpenoid
geroprotector;
plant metabolite
medicagenic acidmedicagenic acid: aglycone constituent of lucerne saponins, upon which their fungastatic & hemolytic activity dependstriterpenoid
dioxadroldioxadrol: See also records for d- and l-forms which are referred to as dexoxadrol and levoxadrol, respectfullydiarylmethane
isoscopoletinisoscopoletin : A hydroxycoumarin that is esculetin in which the hydroxy group at position 7 is replaced by a methoxy group. It is the major primary metabolite of scoparone.aromatic ether;
hydroxycoumarin
plant metabolite
prifeloneprifelone: structure given in first sourcearomatic ketone
ubenimexubenimex: growth inhibitor
honokiolbiphenyls
puupehenone
beta-amyrinbeta-amyrin : A pentacyclic triterpenoid that is oleanane substituted at the 3beta-position by a hydroxy group and containing a double bond between positions 12 and 13. It is one of the most commonly occurring triterpenoids in higher plants.

beta-amyrin: alpha-amyrin is also available; a 5 ring triterpene derived from oleanane that differs from alpha-amyrin in having the 29-carbon at the 20 position; RN given refers to (3 beta)-isomer
pentacyclic triterpenoid;
secondary alcohol
Aspergillus metabolite;
plant metabolite
alpha-amyrinalpha-amyrin : A pentacyclic triterpenoid that is ursane which contains a double bond between positions 12 and 13 and in which the hydrogen at the 3beta position is substituted by a hydroxy group.

alpha-amyrin: beta-amyrin is also available; a 5 ring triterpene derived from taraxasterol that differs from beta-amyrin in having the 29-carbon at the 19 position
pentacyclic triterpenoid;
secondary alcohol
hederagenindihydroxy monocarboxylic acid;
pentacyclic triterpenoid;
sapogenin
plant metabolite
tryptanthrinetryptanthrine: minor constituent of traditional Chinese medicine qing daialkaloid antibiotic;
organic heterotetracyclic compound;
organonitrogen heterocyclic compound
arjunolic acidarjunolic acid : A pentacyclic triterpenoid that is olean-12-en-28-oic acid substituted by hydroxy groups at positions 2, 3 and 23 (the 2alpha,3beta stereoisomer). Isolated from Symplocos lancifolia and Juglans sinensis, it exhibits antioxidant and antimicrobial activities.

arjunolic acid: oleanane type; isol from Cochlospermum tinctorium (Bixaceae); structure given in first source; RN given refers to (2alpha,3beta,4alpha)-isomer; RN for cpd without isomeric designation not avail 12/89
hydroxy monocarboxylic acid;
pentacyclic triterpenoid
antibacterial agent;
antifungal agent;
antioxidant;
metabolite
maslinic acid(2Alpha,3beta)-2,3-dihydroxyolean-12-en-28-oic acid: from Luehea divaricata and Agrimonia eupatoriadihydroxy monocarboxylic acid;
pentacyclic triterpenoid
anti-inflammatory agent;
antineoplastic agent;
antioxidant;
plant metabolite
3,4-dihydroxyphenylethanol3,4-dihydroxyphenylethanol: serotonin metabolite; structurecatechols;
primary alcohol
antineoplastic agent;
antioxidant;
metabolite
priminprimin : A 1,4-benzoquinone having a methoxy substituent at the 2-position and a pentyl substituent at the 6-position.

primin: contact allergen found in the ornamental plant Primula obconica Hance
1,4-benzoquinonesallergen;
antifeedant;
antimicrobial agent;
hapten;
metabolite
uvaoluvaol: from Vauquelinia corymbosa (Rosaceae)triterpenoidmetabolite
8-mercaptoquinoline8-mercaptoquinoline: structure given in first source
rapanonerapanone: antiparasitic agent from Rapanea; structure similar to embelindihydroxy-1,4-benzoquinones
erythrodioldiol;
pentacyclic triterpenoid;
primary alcohol;
secondary alcohol
plant metabolite
fulvestrantfulvestrant : A 3-hydroxy steroid that is 17beta-estradiol in which the 7alpha hydrogen has been replaced by a nonyl group in which one of the hydrogens of the terminal methyl has been replaced by a (4,4,5,5,5-pentafluoropentyl)sulfinyl group. An estrogen receptor antagonist, it is used in the treatment of breast cancer.

Fulvestrant: An estradiol derivative and estrogen receptor antagonist that is used for the treatment of estrogen receptor-positive, locally advanced or metastatic breast cancer.
17beta-hydroxy steroid;
3-hydroxy steroid;
organofluorine compound;
sulfoxide
antineoplastic agent;
estrogen antagonist;
estrogen receptor antagonist
ici 164384ICI 164384: structure given in first source

ICI-164384 : A 3-hydroxy steroid that is 17beta-estradiol substituted by a 11-[butyl(methyl)amino]-11-oxoundecyl group at position 7R. It is a steroidal antioestrogen that inhibits the cell proliferation of breast-carcinoma cell lines.
17beta-hydroxy steroid;
3-hydroxy steroid;
tertiary carboxamide
anti-estrogen;
antineoplastic agent;
estrogen receptor antagonist
asiatic acidmonocarboxylic acid;
pentacyclic triterpenoid;
triol
angiogenesis modulating agent;
metabolite
pd 142893PD 142893: functional antagonist of endothelin-stimulated vasoconstriction
benzyl 2-naphthyl etherbenzyl 2-naphthyl ether: structure in first source
bay x 10052-(4-(quinolin-2-yl-methoxy)phenyl)-2-cyclopentylacetic acid: inhibits synthesis of leukotriene B4 and 5-hydroxyeicosatetraenoic acid; inhibits five-lipoxygenase activating protein(FLAP)and leukotriene A4 hydrolase(LTA4H); structure given in first source;
tetrahydrocurcumintetrahydrocurcumin : A beta-diketone that is curcumin in which both of the double bonds have been reduced to single bonds.beta-diketone;
diarylheptanoid;
polyphenol
metabolite
l 656224L 656224: structure given in first source
rg 6866RG 6866: structure given in first source
bwa 137c
eth 615ETH 615: leukotriene B4 and interleukin-8 antagonist; structure in first source
ici d2138ICI D2138: structure given in first source; inhibitor of leukotriene B4 synthesis
zm 230487ZM 230487: a 5-lipoxygenase inhibitor
ml-3000
5-nitro-2'-deoxyuridine
3',4'-dihydroxyflavone3',4'-dihydroxyflavone: inhibitors of arachidonic acid peroxidation
perifosineammonium betaine;
phospholipid
EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor
4-methoxyhonokiol4-methoxyhonokiol: an NSAID isolated from Magnolia obovata; structure in first source
moracin cbenzofurans
atractylenolide iiiatractylenolide III: from Atractylodes macrocephala Koidz; structure in first sourcenaphthofuranmetabolite
n-benzyl-n-hydroxy-5-phenylpentamideN-benzyl-N-hydroxy-5-phenylpentanamide: a hydroxamic acid class lipoxygenase inhibitor
acrovestoneacrovestone : A polyphenol that is isolated from Acronychia pedunculata and exhibits moderate antioxidant and antityrosinase activities.

acrovestone: isolated from the stem bark of Acronychia pedunculata; RN given from CAS Index Guide (1982-1986)
acetophenones;
aromatic ether;
olefinic compound;
polyphenol
antioxidant;
EC 1.14.18.1 (tyrosinase) inhibitor;
plant metabolite
ici 211965ICI 211965: structure given in first source
boswellic acidboswellic acid: ursane type; RN given refers to (3alpha,4beta)-isomer; active principle of salai guggal; see also record for salai guggaltriterpenoid
miconidinmiconidin: found in Primula; a precursor to primin; inhibits growth in Trypanosoma cruzi
5-o-methylembelin5-O-methyl embelin : A member of the class of monohydroxy-1,4-benzoquinones that is embelin in which the hydroxy group at position 5 is replaced by a methoxy group. Isolated from Lysimachia punctata and Embelia ribes, it exhibits antileishmanial activity as well as inhibitory activity towards hepatitis C protease.

5-O-methylembelin: extracted from mangrove Aegiceras corniculatum; piscicide; see embelin
enol ether;
monohydroxy-1,4-benzoquinones
antileishmanial agent;
antineoplastic agent;
hepatitis C protease inhibitor;
metabolite
elarofibanelarofiban: a GPIIb and GPIIIa receptor antagonist; structure in first source
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
alpha bitter acidhumulon: antibiotic from hops; structurearomatic ketone;
cyclic ketone;
diketone;
tertiary alpha-hydroxy ketone;
triol
antibacterial drug;
antioxidant;
cyclooxygenase 2 inhibitor;
metabolite
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
phenylalanine arginine beta-naphthylamidephenylalanine arginine beta-naphthylamide: a drug efflux pump inhibitor; structure in first sourcepeptide
resveratroltrans-resveratrol : A resveratrol in which the double bond has E configuration.resveratrolantioxidant;
phytoalexin;
plant metabolite;
quorum sensing inhibitor;
radical scavenger
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
6-bromoindirubin-3'-oxime6-bromoindirubin-3'-oxime : A member of the class of biindoles that is indirubin substituted at position 6 by a bromo group and in which the keto group at position 3' has undergone condensation with hydroxylamine to form the corresponding oxime.

6-bromoindirubin-3'-oxime: structure in first source
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
boswellic acid
cinnamaldehyde(E)-cinnamaldehyde : The E (trans) stereoisomer of cinnamaldehyde, the parent of the class of cinnamaldehydes.

3-phenylprop-2-enal : A member of the class of cinnamaldehydes that is prop-2-enal in which a hydrogen at position 3 has been replaced by a phenyl group. The configuration of the double bond is not specified; the name "cinnamaldehyde" is widely used to refer to the E (trans) isomer.
3-phenylprop-2-enal;
cinnamaldehydes
antifungal agent;
EC 4.3.1.24 (phenylalanine ammonia-lyase) inhibitor;
flavouring agent;
hypoglycemic agent;
plant metabolite;
sensitiser;
vasodilator agent
piperinepiperine : A N-acylpiperidine that is piperidine substituted by a (1E,3E)-1-(1,3-benzodioxol-5-yl)-5-oxopenta-1,3-dien-5-yl group at the nitrogen atom. It is an alkaloid isolated from the plant Piper nigrum.benzodioxoles;
N-acylpiperidine;
piperidine alkaloid;
tertiary carboxamide
food component;
human blood serum metabolite;
NF-kappaB inhibitor;
plant metabolite
propolin cnymphaeol A : A tetrahydroxyflavanone that is (2S)-flavanone substituted by hydroxy group at positions 5, 7, 3' and 4' and a geranyl group at position 6. Isolated from Macaranga tanarius and propolis collected in Okinawa, it exhibits radical scavenging activity.

propolin C: a PAK1 inhibitor; from Taiwanese propolis; structure in first source
4'-hydroxyflavanones;
tetrahydroxyflavanone
metabolite;
radical scavenger
xanthohumolxanthohumol : A member of the class of chalcones that is trans-chalcone substituted by hydroxy groups at positions 4, 2' and 4', a methoxy group at position 6' and a prenyl group at position 3'. Isolated from Humulus lupulus, it induces apoptosis in human malignant glioblastoma cells.

xanthohumol: from hop plant, Humulus lupulus
aromatic ether;
chalcones;
polyphenol
anti-HIV-1 agent;
antineoplastic agent;
antiviral agent;
apoptosis inducer;
EC 2.3.1.20 (diacylglycerol O-acyltransferase) inhibitor;
metabolite
3,3',4,5'-tetrahydroxystilbene3,3',4,5'-tetrahydroxystilbene: demethyl derivative of isorhapontigenin; structure in first source; a Syk kinase inhibitor; found in heartwood of FABACEAE; inhibitor of photosynthesis in spinach chloroplasts; may be inhibitor of plant growth; RN given refers to (E)-isomer

piceatannol : A stilbenol that is trans-stilbene in which one of the phenyl groups is substituted by hydroxy groups at positions 3 and 4, while the other phenyl group is substituted by hydroxy groups at positions 3 and 5.
catechols;
polyphenol;
resorcinols;
stilbenol
antineoplastic agent;
apoptosis inducer;
geroprotector;
hypoglycemic agent;
plant metabolite;
protein kinase inhibitor;
tyrosine kinase inhibitor
caffeic acidtrans-caffeic acid : The trans-isomer of caffeic acid.caffeic acidgeroprotector;
mouse metabolite
2-methoxy-6-[[(1-methyl-2-benzimidazolyl)amino]methyl]phenolmethoxybenzenes;
phenols
4-(4-(4-chloro-phenyl)thiazol-2-ylamino)phenolsubstituted aniline
curcumincurcumin : A beta-diketone that is methane in which two of the hydrogens are substituted by feruloyl groups. A natural dyestuff found in the root of Curcuma longa.

Curcumin: A yellow-orange dye obtained from tumeric, the powdered root of CURCUMA longa. It is used in the preparation of curcuma paper and the detection of boron. Curcumin appears to possess a spectrum of pharmacological properties, due primarily to its inhibitory effects on metabolic enzymes.
aromatic ether;
beta-diketone;
diarylheptanoid;
enone;
polyphenol
anti-inflammatory agent;
antifungal agent;
antineoplastic agent;
biological pigment;
contraceptive drug;
dye;
EC 1.1.1.205 (IMP dehydrogenase) inhibitor;
EC 1.1.1.21 (aldehyde reductase) inhibitor;
EC 1.1.1.25 (shikimate dehydrogenase) inhibitor;
EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor;
EC 1.8.1.9 (thioredoxin reductase) inhibitor;
EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor;
EC 3.5.1.98 (histone deacetylase) inhibitor;
flavouring agent;
food colouring;
geroprotector;
hepatoprotective agent;
immunomodulator;
iron chelator;
ligand;
lipoxygenase inhibitor;
metabolite;
neuroprotective agent;
nutraceutical;
radical scavenger
capsaicinALGRX-4975: an injectable capsaicin (TRPV1 receptor agonist) formulation for longlasting pain relief

capsaicinoid : A family of aromatic fatty amides produced as secondary metabolites by chilli peppers.
capsaicinoidnon-narcotic analgesic;
TRPV1 agonist;
voltage-gated sodium channel blocker
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
atractylonatractylon: from Atractylodes rhizomes; has antihepatotoxic activity; structure given in first sourcesesquiterpenoid
via 2291atreleuton: structure given in first source
l 6635363-[3-(tert-butylsulfanyl)-1-(4-chlorobenzyl)-5-(propan-2-yl)-1H-indol-2-yl]-2,2-dimethylpropanoic acid : A member of the class of indoles that is 1H-indole substituted by a isopropyl group at position 5, a tert-butylsulfanediyl group at position 3, a 4-chlorobenzyl group at position 1 and a 2-carboxy-2-methylpropyl group at position 2. It acts as an inhibitor of arachidonate 5-lipoxygenase.

MK-886: orally active leukotriene biosynthesis inhibitor
aryl sulfide;
indoles;
monocarboxylic acid;
monochlorobenzenes
antineoplastic agent;
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
leukotriene antagonist
1-phenyl-2-[[4-(trifluoromethyl)phenyl]methylthio]imidazoleimidazoles
3-hydroxy-2-methyl-4h-pyran-4-thione3-hydroxy-2-methyl-4H-pyran-4-thione: inhibits Bla2 beta-lactamase; structure in first source
quercetin7-hydroxyflavonol;
pentahydroxyflavone
antibacterial agent;
antineoplastic agent;
antioxidant;
Aurora kinase inhibitor;
chelator;
EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor;
geroprotector;
phytoestrogen;
plant metabolite;
protein kinase inhibitor;
radical scavenger
leukotriene a4leukotriene A4 : A leukotriene that is the (5S,6S)-epoxy derivative of (7E,9E,11Z,14Z)-icosa-7,9,11,14-tetraenoic acid.

Leukotriene A4: (2S-(2 alpha,3 beta(1E,3E,5Z,8Z)))-3-(1,3,5,8-Tetradecatetraenyl)oxiranebutanoic acid. An unstable allylic epoxide, formed from the immediate precursor 5-HPETE via the stereospecific removal of a proton at C-10 and dehydration. Its biological actions are determined primarily by its metabolites, i.e., LEUKOTRIENE B4 and cysteinyl-leukotrienes. Alternatively, leukotriene A4 is converted into LEUKOTRIENE C4 by glutathione-S-transferase or into 5,6-di-HETE by the epoxide-hydrolase. (From Dictionary of Prostaglandins and Related Compounds, 1990)
epoxy fatty acid;
leukotriene;
long-chain fatty acid;
oxylipin;
polyunsaturated fatty acid
human metabolite;
mouse metabolite;
plant metabolite
luteolin3'-hydroxyflavonoid;
tetrahydroxyflavone
angiogenesis inhibitor;
anti-inflammatory agent;
antineoplastic agent;
apoptosis inducer;
c-Jun N-terminal kinase inhibitor;
EC 2.3.1.85 (fatty acid synthase) inhibitor;
immunomodulator;
nephroprotective agent;
plant metabolite;
radical scavenger;
vascular endothelial growth factor receptor antagonist
scopoletinhydroxycoumarinplant growth regulator;
plant metabolite
15-keto-5,8,11,13-eicosatetraenoic acid15-keto-5,8,11,13-eicosatetraenoic acid: RN given refers to (E,Z,Z,Z)-isomer; RN for cpd without isomeric designation not available 3/88

15-oxo-ETE : An oxoicosatetraenoic acid having (5Z,8Z,11Z,13E) double bond stereochemistry, and an oxo group in position 15.
oxoicosatetraenoic acidhuman metabolite
5-hydroxy-6,8,11,14-eicosatetraenoic acid5-HETE : A HETE having a 5-hydroxy group and (6E)-, (8Z)-, (11Z)- and (14Z)-double bonds.

5(S)-HETE : A HETE having a (5S)-hydroxy group and (6E)-, (8Z)-, (11Z)- and (14Z)-double bonds.
HETEhuman metabolite;
mouse metabolite
kaempferol7-hydroxyflavonol;
flavonols;
tetrahydroxyflavone
antibacterial agent;
geroprotector;
human blood serum metabolite;
human urinary metabolite;
human xenobiotic metabolite;
plant metabolite
baicaleintrihydroxyflavoneangiogenesis inhibitor;
anti-inflammatory agent;
antibacterial agent;
anticoronaviral agent;
antifungal agent;
antineoplastic agent;
antioxidant;
apoptosis inducer;
EC 1.13.11.31 (arachidonate 12-lipoxygenase) inhibitor;
EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor;
EC 4.1.1.17 (ornithine decarboxylase) inhibitor;
ferroptosis inhibitor;
geroprotector;
hormone antagonist;
plant metabolite;
prostaglandin antagonist;
radical scavenger
morusinmorusin : 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
trans-2,3',4,5'-tetrahydroxystilbenetrans-2,3',4,5'-tetrahydroxystilbene: hydroxystilbene oxyresveratrolstilbenoid
pterostilbenediether;
methoxybenzenes;
stilbenol
anti-inflammatory agent;
antineoplastic agent;
antioxidant;
apoptosis inducer;
hypoglycemic agent;
neuroprotective agent;
neurotransmitter;
plant metabolite;
radical scavenger
caffeic acid phenethyl esterphenethyl caffeate : An alkyl caffeate ester in which 2-phenylethyl is the alkyl component.alkyl caffeate esteranti-inflammatory agent;
antibacterial agent;
antineoplastic agent;
antioxidant;
antiviral agent;
immunomodulator;
metabolite;
neuroprotective agent
shogaolshogaol: from ginger, ZINGIBER OFFICINALE; less mutagenic than GINGEROL; structure given in first sourceenone;
monomethoxybenzene;
phenols
wedelolactonewedelolactone : A member of the class of coumestans that is coumestan with hydroxy substituents as positions 1, 8 and 9 and a methoxy substituent at position 3.

wedelolactone: antihepatotoxic coumestan from Eclipta prostrata and Wedelia calendulacea (both Asteraceae); structure given in first source
aromatic ether;
coumestans;
delta-lactone;
polyphenol
antineoplastic agent;
apoptosis inducer;
EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor;
hepatoprotective agent;
metabolite
topiramatetopiramate : A hexose derivative that is 2,3:4,5-di-O-isopropylidene-beta-D-fructopyranose in which the hydroxy group has been converted to the corresponding sulfamate ester. It blocks voltage-dependent sodium channels and is used as an antiepileptic and for the prevention of migraine.

Topiramate: A sulfamate-substituted fructose analog that was originally identified as a hypoglycemic agent. It is used for the treatment of EPILEPSY and MIGRAINE DISORDERS, and may also promote weight loss.
cyclic ketal;
ketohexose derivative;
sulfamate ester
anticonvulsant;
sodium channel blocker
6,7,4'-trihydroxyisoflavone4',6,7-trihydroxyisoflavone : A hydroxyisoflavone that is daidzein bearing an additional hydroxy substituent at position 6.

6,7,4'-trihydroxyisoflavone: structure in first source
7-hydroxyisoflavonesanti-inflammatory agent;
antimutagen;
EC 1.14.18.1 (tyrosinase) inhibitor;
metabolite;
PPARalpha agonist;
PPARgamma agonist
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.
atractylenolide iatractylenolide I: from Atractylodes macrocephala Koidz; structure in first source
3',4',7-trihydroxyflavone3',4',7-trihydroxyflavone: from the Sudanese medicinal plant Albizia zygia; structure in first sourceflavones
4,3',5'-tri-o-methylpiceatannol
3,4',5-trimethoxystilbene3,4',5-trimethoxystilbene: structure in first source
4',7,8-trihydroxyisoflavone4',7,8-trihydroxyisoflavone: from Streptomyces sp OH-1049; structure given in first sourceisoflavones
eupomatenoid 6eupomatenoid 6: RN given for (E)-isomer; structure in first source

rataniaphenol II : A member of the class of benzofurans that is 1-benzofuran substituted by a 4-hydroxyphenyl group at position 2, a methyl group at position 3 and a prop-1-en-1-yl group at position 5. It is a lignan derivative isolated from the roots of Krameria lappacea.
benzofurans;
phenols
anti-inflammatory agent;
cyclooxygenase 1 inhibitor;
cyclooxygenase 2 inhibitor;
NF-kappaB inhibitor;
plant metabolite
al 3264AL 3264: structure given in first source
bwa 4c
kme 4KME 4: structure given in first source
enofelast
13-oxo-9,11-octadecadienoic acid13-oxo-9Z,11E-ODE : An oxooctadecadienoic acid that consists of 9Z,11E-octadecadienoic acid bearing an additional 13-keto substituent. In addtion it has been found as a natural product found in Carthamus oxyacantha.13-oxo-9,11-octadecadienoic acidmetabolite;
mouse metabolite
hylin
corosolic acidtriterpenoidmetabolite
men 11558
11-keto-boswellic acid
em 800EM 800: EM-800 is the prodrug of EM-652; EM-800 and EM-776 are (S)- and (R)-isomers, respectively; structure in first source
men 11420
3'-hydroxypterostilbene3'-hydroxypterostilbene: an apoptosis-inducing agent; structure in first source
jaspaquinoljaspaquinol: structure in first source
xanthohumol cxanthohumol C: has antineoplastic activity; isolated from the hops of Humulus lupulus; structure in first sourcechalcones
trans-delta-tocotrienoloic acidtocotrienoloic acid: from leaves of Tovomitopsis psychotriifolia; structure given in first sourcetocotrienol
myxochelin bmyxochelin B : A member of the class of benzamides obtained by formal condensation of the 1- and 6-amino groups of hexane-1,2,6-triamine with the carboxy groups from two molecules of 2,3-dihydroxybenzoic acid followed by reduction of the amide carbonyl at position 5 to a hydroxy group.

myxochelin B: isolated from Stigmatella aurantiaca; structure in first source
benzamides;
catechols
bacterial metabolite;
siderophore
conocarpanconocarpan: RN given for (2R-(2alpha,3beta,5(E))-isomer; from the roots of Krameria tomentosa (Krameriaceae); structure in first source
acetyl-11-ketoboswellic acidacetyl-11-ketoboswellic acid: a 5-lipoxygenase inhibitor; structure given in first sourcetriterpenoid
3-o-acetyl-beta-boswellic acid3-O-acetyl-beta-boswellic acid: isolated from Boswellia serrata; structure in first source
11-deoxy glycyrrhetinic acidtriterpenoid
atractylenolide iiatractylenolide II: from Atractylodes ovata; structure in first sourcesesquiterpene lactone
myxochelin amyxochelin A: structure given in first source; catechole siderophore isolated from Angiococcus disciformis
pd 156707
ys 1212-(4-chloro-6-(2,3-dimethylphenylamino)pyrimidin-2-ylthio)octanoic acid: inhibits microsomal prostaglanding E2 synthase; structure in first sourcemedium-chain fatty acid
N-[(5-bromo-8-hydroxy-7-quinolinyl)-thiophen-2-ylmethyl]acetamidehydroxyquinoline
myrtucommulone amyrtucommulone A: from the leaves of myrtle, Myrtus communis (Myrtaceae); structure in first sourcearomatic ketone
ML355ML355 : A sulfonamide resulting from the formal condensation of the amino group of 2-aminobenzothiazole with the sulfo group of 4-[(2-hydroxy-3-methoxybenzyl)amino]benzenesulfonic acid. It is an inhibitor of 12-lipoxygenase, being developed by Veralox Therapeutics for the treatment of heparin-induced thrombocytopenia and thrombosis.

ML355: 12-Lipoxygenase inhibitor
benzothiazoles;
monomethoxybenzene;
phenols;
secondary amino compound;
substituted aniline;
sulfonamide
EC 1.13.11.31 (arachidonate 12-lipoxygenase) inhibitor;
platelet aggregation inhibitor
7-bromoindirubin-3'-oxime7-bromoindirubin-3'-oxime: has mild protein kinase inhibitory activity; induces caspase-independent cell death; structure in first source
isaindigotoneisaindigotone: 3-arylidenepyrrolo(2,1-b)quinazoline-9-one from Isatis indigotica; structure in first source
hydrazinocurcuminhydrazinocurcumin : A pyrazole obtained by cyclocodensation of the two carbonyl groups of curcumin with hydrazine.

hydrazinocurcumin: structure in first source
aromatic ether;
olefinic compound;
polyphenol;
pyrazoles
angiogenesis modulating agent;
antineoplastic agent;
EC 2.3.1.48 (histone acetyltransferase) inhibitor;
EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor