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glutathione peroxidase activity

Definition

Target type: molecularfunction

Catalysis of the reaction: 2 glutathione + hydrogen peroxide = oxidized glutathione + 2 H2O. [EC:1.11.1.9, PMID:36771108]

Glutathione peroxidase (GPx) activity is a critical enzymatic function that protects cells from oxidative damage caused by reactive oxygen species (ROS). These enzymes catalyze the reduction of hydrogen peroxide (H2O2) and organic hydroperoxides to water and corresponding alcohols, respectively. The reaction utilizes glutathione (GSH) as a reducing substrate, which is oxidized to glutathione disulfide (GSSG) in the process. The catalytic cycle begins with the binding of H2O2 or an organic hydroperoxide to the enzyme's active site. This binding event triggers the formation of a selenolate anion on the active site selenocysteine residue. The selenolate anion then reacts with the peroxide substrate, reducing it to water or alcohol and oxidizing the selenocysteine residue to a selenenic acid. The selenenic acid is then reduced back to the selenolate anion by glutathione, completing the catalytic cycle. GPx enzymes play a vital role in protecting cells from oxidative stress and maintaining cellular redox homeostasis. They are involved in a wide range of physiological processes, including cellular signaling, immune function, and aging. Deficiencies in GPx activity can lead to increased oxidative damage and a number of diseases, including cancer, cardiovascular disease, and neurodegenerative disorders.'
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Proteins (9)

ProteinDefinitionTaxonomy
Arachidonate 5-lipoxygenase-activating proteinAn arachidonate 5-lipoxygenase-activating protein that is encoded in the genome of human. [PRO:DNx, UniProtKB:P20292]Homo sapiens (human)
Leukotriene C4 synthaseA leukotriene C4 synthase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q16873]Homo sapiens (human)
Phospholipid hydroperoxide glutathione peroxidaseA phospholipid hydroperoxide glutathione peroxidase GPX4 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P36969]Homo sapiens (human)
Glutathione S-transferase Mu 2A glutathione S-transferase mu 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P28161]Homo sapiens (human)
Microsomal glutathione S-transferase 1A microsomal glutathione S-transferase 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P10620]Homo sapiens (human)
Glutathione S-transferase PA glutathione S-transferase P that is encoded in the genome of human. [PRO:DNx, UniProtKB:P09211]Homo sapiens (human)
Glutathione S-transferase A1A glutathione S-transferase A1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P08263]Homo sapiens (human)
Glutathione peroxidase 1A glutathione peroxidase 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P07203]Homo sapiens (human)
Prostaglandin E synthaseA prostaglandin E synthase that is encoded in the genome of human. [PRO:DNx, UniProtKB:O14684]Homo sapiens (human)

Compounds (61)

CompoundDefinitionClassesRoles
acetaminophenAcetaminophen: Analgesic antipyretic derivative of acetanilide. It has weak anti-inflammatory properties and is used as a common analgesic, but may cause liver, blood cell, and kidney damage.

paracetamol : A member of the class of phenols that is 4-aminophenol in which one of the hydrogens attached to the amino group has been replaced by an acetyl group.
acetamides;
phenols
antipyretic;
cyclooxygenase 1 inhibitor;
cyclooxygenase 2 inhibitor;
cyclooxygenase 3 inhibitor;
environmental contaminant;
ferroptosis inducer;
geroprotector;
hepatotoxic agent;
human blood serum metabolite;
non-narcotic analgesic;
non-steroidal anti-inflammatory drug;
xenobiotic
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
celecoxiborganofluorine compound;
pyrazoles;
sulfonamide;
toluenes
cyclooxygenase 2 inhibitor;
geroprotector;
non-narcotic analgesic;
non-steroidal anti-inflammatory drug
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
ethacrynic acidetacrynic acid : An aromatic ether that is phenoxyacetic acid in which the phenyl ring is substituted by chlorines at positions 2 and 3, and by a 2-methylidenebutanoyl group at position 4. It is a loop diuretic used to treat high blood pressure resulting from diseases such as congestive heart failure, liver failure, and kidney failure. It is also a glutathione S-transferase (EC 2.5.1.18) inhibitor.

Ethacrynic Acid: A compound that inhibits symport of sodium, potassium, and chloride primarily in the ascending limb of Henle, but also in the proximal and distal tubules. This pharmacological action results in excretion of these ions, increased urinary output, and reduction in extracellular fluid. This compound has been classified as a loop or high ceiling diuretic.
aromatic ether;
aromatic ketone;
dichlorobenzene;
monocarboxylic acid
EC 2.5.1.18 (glutathione transferase) inhibitor;
ion transport inhibitor;
loop diuretic
indomethacinindometacin : A member of the class of indole-3-acetic acids that is indole-3-acetic acid in which the indole ring is substituted at positions 1, 2 and 5 by p-chlorobenzoyl, methyl, and methoxy groups, respectively. A non-steroidal anti-inflammatory drug, it is used in the treatment of musculoskeletal and joint disorders including osteoarthritis, rheumatoid arthritis, gout, bursitis and tendinitis.

Indomethacin: A non-steroidal anti-inflammatory agent (NSAID) that inhibits CYCLOOXYGENASE, which is necessary for the formation of PROSTAGLANDINS and other AUTACOIDS. It also inhibits the motility of POLYMORPHONUCLEAR LEUKOCYTES.
aromatic ether;
indole-3-acetic acids;
monochlorobenzenes;
N-acylindole
analgesic;
drug metabolite;
EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor;
environmental contaminant;
gout suppressant;
non-steroidal anti-inflammatory drug;
xenobiotic;
xenobiotic 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
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
d-alpha tocopherol(R,R,R)-alpha-tocopherol : An alpha-tocopherol that has R,R,R configuration. The naturally occurring stereoisomer of alpha-tocopherol, it is found particularly in sunflower and olive oils.

tocopherol : A collective name for a group of closely related lipids that contain a chroman-6-ol nucleus substituted at position 2 by a methyl group and by a saturated hydrocarbon chain consisting of three isoprenoid units. They are designated as alpha-, beta-, gamma-, and delta-tocopherol depending on the number and position of additional methyl substituents on the aromatic ring. Tocopherols occur in vegetable oils and vegetable oil products, almost exclusively with R,R,R configuration. Tocotrienols differ from tocopherols only in having three double bonds in the hydrocarbon chain.

vitamin E : Any member of a group of fat-soluble chromanols that exhibit biological activity against vitamin E deficiency. The vitamers in this class consists of a chroman-6-ol core which is substituted at position 2 by a methyl group and (also at position 2) either a saturated or a triply-unsaturated hydrocarbon chain consisting of three isoprenoid units. The major function of vitamin E is to act as a natural antioxidant by scavenging free radicals and molecular oxygen.

Vitamin E: A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of ISOPRENOIDS.
alpha-tocopherolalgal metabolite;
antiatherogenic agent;
anticoagulant;
antioxidant;
antiviral agent;
EC 2.7.11.13 (protein kinase C) inhibitor;
immunomodulator;
micronutrient;
nutraceutical;
plant metabolite
cefoperazonecefoperazone : A semi-synthetic parenteral cephalosporin with a tetrazolyl moiety that confers beta-lactamase resistance.

Cefoperazone: Semisynthetic broad-spectrum cephalosporin with a tetrazolyl moiety that is resistant to beta-lactamase. It may be used to treat Pseudomonas infections.
cephalosporinantibacterial 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
mk 0591MK 0591: structure given in first source; MK 0591 was previously L-686,708; inhibits leukotriene biosynthesis by inhibiting 5-lipoxygenase activating protein
epigallocatechin gallate(-)-epigallocatechin 3-gallate : A gallate ester obtained by the formal condensation of gallic acid with the (3R)-hydroxy group of (-)-epigallocatechin.

epigallocatechin gallate: a steroid 5alpha-reductase inhibitor and antimutagen in green tea (Camellia sinensis)
flavans;
gallate ester;
polyphenol
antineoplastic agent;
antioxidant;
apoptosis inducer;
geroprotector;
Hsp90 inhibitor;
neuroprotective agent;
plant metabolite
salvinsalvin: a biocyclic diterpenoid; from sage and rosemary (Lamiaceae)abietane diterpenoid;
carbotricyclic compound;
catechols;
monocarboxylic acid
angiogenesis modulating agent;
anti-inflammatory agent;
antineoplastic agent;
antioxidant;
apoptosis inducer;
food preservative;
HIV protease inhibitor;
plant metabolite
atranorinatranorin: RN given refers to parent cpd; structure given in first sourcecarbonyl compound
hexylglutathioneS-hexylglutathione : An S-substituted glutathione that is glutathione in which the hydrogen of the thiol has been replaced by a hexyl group (PDB entry: 1PN9).S-substituted glutathione
5-chloromethylfluorescein diacetateacetate esterfluorochrome
ml-3000
malagashaninemalagashanine: from Strychnos sp.; structure given in first source
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
boswellic acidboswellic acid: ursane type; RN given refers to (3alpha,4beta)-isomer; active principle of salai guggal; see also record for salai guggaltriterpenoid
perlatolinic acidperlatolinic acid: C25-H32-O7; structure in first sourcecarbonyl compound
hyperforinhyperforin : A cyclic terpene ketone that is a prenylated carbobicyclic acylphloroglucinol derivative produced by St. John's Wort, Hypericum perforatum.

hyperforin: a prenylated acylphloroglucinol derivative; antibiotic component of novoimanine; psychoactive agent in St. John's wort; Russian; structure;
carnosolcarnosol: isolated from Lepechinia hastataditerpenoid
olivetoric acidolivetoric acid: isolated from Pseudevernia furfuracea; structure in first sourcecarbonyl compound
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
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
2-chloro-N-heptyl-N-(3-methylphenyl)acetamideanilide
N-(1,3-benzodioxol-5-yl)-2-chloro-N-[(2-prop-2-enoxyphenyl)methyl]acetamidebenzodioxoles
thiambutosinethiambutosine: thiourea antileprotic agent used in patients who cannot tolerate sulfones; minor descriptor (77-85); on-line & Index Medicus PHENYLTHIOUREA/AA (77-85)
1-(2-chlorobenzyl)-2-(1-(4-isobutylphenyl)ethyl)-1h-benzimidazole1-(2-chlorobenzyl)-2-(1-(4-isobutylphenyl)ethyl)-1H-benzimidazole: targets 5-lipoxygenase-activating protein to inhibit leukotriene biosynthesis; structure 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
ML162ML162 : A monochlorobenzene that is benzene substituted by (chloroacetyl){2-oxo-2-[(2-phenylethyl)amino]-1-(thiophen-2-yl)ethyl}amino, chloro and methoxy groups at positions 1, 3 and 4, respectively. It is a covalent inhibitor of glutathione peroxidase 4 (GPX4) that induces ferroptosis in cells.monochlorobenzenes;
monomethoxybenzene;
organochlorine compound;
secondary carboxamide;
tertiary carboxamide;
thiophenes
EC 1.11.1.9 (glutathione peroxidase) inhibitor;
ferroptosis inducer
montelukastmontelukast: a leukotriene D4 receptor antagonistaliphatic sulfide;
monocarboxylic acid;
quinolines
anti-arrhythmia drug;
anti-asthmatic drug;
leukotriene antagonist
psoralidinpsoralidin : A member of the class of coumestans that is coumestan substituted by hydroxy groups at positions 3 and 9 and a prenyl group at position 2 respectively.coumestans;
delta-lactone;
polyphenol
estrogen receptor agonist;
plant metabolite
ellagic acidcatechols;
cyclic ketone;
lactone;
organic heterotetracyclic compound;
polyphenol
antioxidant;
EC 1.14.18.1 (tyrosinase) inhibitor;
EC 2.3.1.5 (arylamine N-acetyltransferase) inhibitor;
EC 2.4.1.1 (glycogen phosphorylase) inhibitor;
EC 2.5.1.18 (glutathione transferase) inhibitor;
EC 2.7.1.127 (inositol-trisphosphate 3-kinase) inhibitor;
EC 2.7.1.151 (inositol-polyphosphate multikinase) inhibitor;
EC 2.7.4.6 (nucleoside-diphosphate kinase) inhibitor;
EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor;
EC 5.99.1.2 (DNA topoisomerase) inhibitor;
EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor;
food additive;
fungal metabolite;
geroprotector;
plant metabolite;
skin lightening agent
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
guttiferone eguttiferone E: isolated from the fruits of Garcinia pyrifera collected in Malaysia; structure in first source
cefuroxime3-(carbamoyloxymethyl)cephalosporin;
furans;
oxime O-ether
drug allergen
ceftriaxone1,2,4-triazines;
1,3-thiazoles;
cephalosporin;
oxime O-ether
antibacterial drug;
drug allergen;
EC 3.5.2.6 (beta-lactamase) inhibitor
2-tert-butyl-9-fluoro-3,6-dihydro-7h-benz(h)imidazo(4,5-f)isoquinoline-7-one2-tert-butyl-9-fluoro-1,6-dihydrobenzo[h]imidazo[4,5-f]isoquinolin-7-one : An organic heterotetracyclic compound that is 1,6-dihydrobenzo[h]imidazo[4,5-f]isoquinolin-7-one bearing additional tert-butyl and fluoro substituents at positions 2 and 9 respectively.

2-tert-butyl-9-fluoro-3,6-dihydro-7H-benz(h)imidazo(4,5-f)isoquinoline-7-one: a janus-activated kinase inhibitor
organic heterotetracyclic compound;
organofluorine compound
EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor
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
2-[[5,6-bis(2-furanyl)-1,2,4-triazin-3-yl]thio]-1-(4-methoxyphenyl)ethanonearomatic ketone
bwa 4c
2-crotonyloxymethyl-2-cyclohexenone2-crotonyloxymethyl-2-cyclohexenone: structure given in first source
ceftizoximecephalosporinantibacterial drug
6-(7-nitro-2,1,3-benzoxadiazol-4-ylthio)hexanol6-(7-nitro-2,1,3-benzoxadiazol-4-ylthio)hexanol: a specific glutathione S-transferase inhibitor; structure in first source
11-keto-boswellic acid
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
roburic acidroburic acid : A tetracyclic triterpenoid with formula C30H40O2 that is isolated from the roots of Gentiana dahurica and Gentiana macrophylla.monocarboxylic acid;
olefinic compound;
tetracyclic triterpenoid
plant metabolite
mf63 compoundMF63 compound: a phenanthrene imidazole identified as a potent, selective, and orally active mPGES-1 inhibitor; structure in first source
beta-Elemonic acidbeta-elemonic acid: extracted from Boswellia carteriitriterpenoid
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
p-Glu-Arg-Pro-Arg-Leu-Ser-His-Lys-Gly-Pro-Met-Pro-Phep-Glu-Arg-Pro-Arg-Leu-Ser-His-Lys-Gly-Pro-Met-Pro-Phe : A thirteen-membered polypeptide consisting of p-Glu, Arg, Pro, Arg, Leu, Ser, His, Lys, Gly, Pro, Met, Pro and Phe residues joined in sequence.polypeptideapoptosis inhibitor;
human metabolite;
neuroprotective agent
myrtucommulone amyrtucommulone A: from the leaves of myrtle, Myrtus communis (Myrtaceae); structure in first sourcearomatic ketone
ML-210ML-210 : An N-acylpiperazine that is piperazine substituted by 5-methyl-4-nitro-1,2-oxazole-3-carbonyl and bis(4-chlorophenyl)methyl groups at positions 1 and 4, respectively. It is a glutathione peroxidase 4 (GPX4) inhibitor which induces ferroptosis in cancer cells expressing the RAS oncogene.C-nitro compound;
diarylmethane;
isoxazoles;
monochlorobenzenes;
N-acylpiperazine;
N-alkylpiperazine;
tertiary carboxamide
antineoplastic agent;
EC 1.11.1.9 (glutathione peroxidase) inhibitor;
ferroptosis inducer;
prodrug
arzanolarzanol: a prenylated alpha-pyrone-phloroglucinol etherodimer from Helichrysum italicum subsp.microphyllum; has antioxidant and cytotoxic activity; structure in first source
pf 9184
flavellagic acidflavellagic acid: RN given refers to parent cpd; structure