Exact Mass: 541.1487

Quin 2

2-{[2-({8-[bis(carboxymethyl)amino]-6-methoxyquinolin-2-yl}methoxy)-4-methylphenyl](carboxymethyl)amino}acetic acid

C26H27N3O10 (541.1696)

Cys Cys Met Trp

(2S)-2-[(2S)-2-[(2R)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-sulfanylpropanamido]-4-(methylsulfanyl)butanamido]-3-(1H-indol-3-yl)propanoic acid

Cys Cys Trp Met

(2S)-2-[(2S)-2-[(2R)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanamido]-4-(methylsulfanyl)butanoic acid

Cys Glu Gln Tyr

(4S)-4-[(2R)-2-amino-3-sulfanylpropanamido]-4-{[(1S)-3-carbamoyl-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}propyl]carbamoyl}butanoic acid

Cys Glu Tyr Gln

(4S)-4-[(2R)-2-amino-3-sulfanylpropanamido]-4-{[(1S)-1-{[(1S)-3-carbamoyl-1-carboxypropyl]carbamoyl}-2-(4-hydroxyphenyl)ethyl]carbamoyl}butanoic acid

Cys Met Cys Trp

(2S)-2-[(2R)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-4-(methylsulfanyl)butanamido]-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanoic acid

Cys Met Trp Cys

(2R)-2-[(2S)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-4-(methylsulfanyl)butanamido]-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanoic acid

Cys Gln Glu Tyr

(4S)-4-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-4-carbamoylbutanamido]-4-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}butanoic acid

Cys Gln Tyr Glu

(2S)-2-[(2S)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-4-carbamoylbutanamido]-3-(4-hydroxyphenyl)propanamido]pentanedioic acid

Cys Trp Cys Met

(2S)-2-[(2R)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanamido]-4-(methylsulfanyl)butanoic acid

Cys Trp Met Cys

(2R)-2-[(2S)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanamido]-4-(methylsulfanyl)butanamido]-3-sulfanylpropanoic acid

Cys Tyr Glu Gln

(4S)-4-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-(4-hydroxyphenyl)propanamido]-4-{[(1S)-3-carbamoyl-1-carboxypropyl]carbamoyl}butanoic acid

Cys Tyr Gln Glu

(2S)-2-[(2S)-2-[(2S)-2-[(2R)-2-amino-3-sulfanylpropanamido]-3-(4-hydroxyphenyl)propanamido]-4-carbamoylbutanamido]pentanedioic acid

Asp Met Asn Tyr

(3S)-3-amino-3-{[(1S)-1-{[(1S)-2-carbamoyl-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}ethyl]carbamoyl}-3-(methylsulfanyl)propyl]carbamoyl}propanoic acid

Asp Met Tyr Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carboxypropanamido]-4-(methylsulfanyl)butanamido]-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanoic acid

Asp Asn Met Tyr

(3S)-3-amino-3-{[(1S)-2-carbamoyl-1-{[(1S)-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}-3-(methylsulfanyl)propyl]carbamoyl}ethyl]carbamoyl}propanoic acid

Asp Asn Tyr Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carboxypropanamido]-3-carbamoylpropanamido]-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanoic acid

Asp Tyr Met Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carboxypropanamido]-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanamido]-3-carbamoylpropanoic acid

Asp Tyr Asn Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carboxypropanamido]-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanamido]-4-(methylsulfanyl)butanoic acid

Glu Cys Gln Tyr

(4S)-4-amino-4-{[(1R)-1-{[(1S)-3-carbamoyl-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}propyl]carbamoyl}-2-sulfanylethyl]carbamoyl}butanoic acid

Glu Cys Tyr Gln

(2S)-2-[(2S)-2-[(2R)-2-[(2S)-2-amino-4-carboxybutanamido]-3-sulfanylpropanamido]-3-(4-hydroxyphenyl)propanamido]-4-carbamoylbutanoic acid

Glu Gln Cys Tyr

(4S)-4-amino-4-{[(1S)-3-carbamoyl-1-{[(1R)-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}-2-sulfanylethyl]carbamoyl}propyl]carbamoyl}butanoic acid

Glu Gln Tyr Cys

(4S)-4-amino-4-{[(1S)-3-carbamoyl-1-{[(1S)-1-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}-2-(4-hydroxyphenyl)ethyl]carbamoyl}propyl]carbamoyl}butanoic acid

Glu Tyr Cys Gln

(2S)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-4-carboxybutanamido]-3-(4-hydroxyphenyl)propanamido]-3-sulfanylpropanamido]-4-carbamoylbutanoic acid

Glu Tyr Gln Cys

(4S)-4-amino-4-{[(1S)-1-{[(1S)-3-carbamoyl-1-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}propyl]carbamoyl}-2-(4-hydroxyphenyl)ethyl]carbamoyl}butanoic acid

Met Cys Cys Trp

(2S)-2-[(2R)-2-[(2R)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-sulfanylpropanamido]-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanoic acid

Met Cys Trp Cys

(2R)-2-[(2S)-2-[(2R)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-sulfanylpropanamido]-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanoic acid

Met Asp Asn Tyr

(3S)-3-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-{[(1S)-2-carbamoyl-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}ethyl]carbamoyl}propanoic acid

Met Asp Tyr Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-carboxypropanamido]-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanoic acid

Met Asn Asp Tyr

(3S)-3-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-carbamoylpropanamido]-3-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}propanoic acid

Met Asn Tyr Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-carbamoylpropanamido]-3-(4-hydroxyphenyl)propanamido]butanedioic acid

Met Trp Cys Cys

(2R)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanamido]-3-sulfanylpropanoic acid

Met Tyr Asp Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-(4-hydroxyphenyl)propanamido]-3-carboxypropanamido]-3-carbamoylpropanoic acid

Met Tyr Asn Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanamido]butanedioic acid

Asn Asp Met Tyr

(3S)-3-[(2S)-2-amino-3-carbamoylpropanamido]-3-{[(1S)-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}-3-(methylsulfanyl)propyl]carbamoyl}propanoic acid

Asn Asp Tyr Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carbamoylpropanamido]-3-carboxypropanamido]-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanoic acid

Asn Met Asp Tyr

(3S)-3-[(2S)-2-[(2S)-2-amino-3-carbamoylpropanamido]-4-(methylsulfanyl)butanamido]-3-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}propanoic acid

Asn Met Tyr Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carbamoylpropanamido]-4-(methylsulfanyl)butanamido]-3-(4-hydroxyphenyl)propanamido]butanedioic acid

Asn Tyr Asp Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carbamoylpropanamido]-3-(4-hydroxyphenyl)propanamido]-3-carboxypropanamido]-4-(methylsulfanyl)butanoic acid

Asn Tyr Met Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carbamoylpropanamido]-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanamido]butanedioic acid

Gln Cys Glu Tyr

(4S)-4-[(2R)-2-[(2S)-2-amino-4-carbamoylbutanamido]-3-sulfanylpropanamido]-4-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}butanoic acid

Gln Cys Tyr Glu

(2S)-2-[(2S)-2-[(2R)-2-[(2S)-2-amino-4-carbamoylbutanamido]-3-sulfanylpropanamido]-3-(4-hydroxyphenyl)propanamido]pentanedioic acid

Gln Glu Cys Tyr

(4S)-4-[(2S)-2-amino-4-carbamoylbutanamido]-4-{[(1R)-1-{[(1S)-1-carboxy-2-(4-hydroxyphenyl)ethyl]carbamoyl}-2-sulfanylethyl]carbamoyl}butanoic acid

Gln Glu Tyr Cys

(4S)-4-[(2S)-2-amino-4-carbamoylbutanamido]-4-{[(1S)-1-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}-2-(4-hydroxyphenyl)ethyl]carbamoyl}butanoic acid

Gln Tyr Cys Glu

(2S)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-4-carbamoylbutanamido]-3-(4-hydroxyphenyl)propanamido]-3-sulfanylpropanamido]pentanedioic acid

Gln Tyr Glu Cys

(4S)-4-[(2S)-2-[(2S)-2-amino-4-carbamoylbutanamido]-3-(4-hydroxyphenyl)propanamido]-4-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}butanoic acid

Trp Cys Cys Met

(2S)-2-[(2R)-2-[(2R)-2-[(2S)-2-amino-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanamido]-3-sulfanylpropanamido]-4-(methylsulfanyl)butanoic acid

Trp Cys Met Cys

(2R)-2-[(2S)-2-[(2R)-2-[(2S)-2-amino-3-(1H-indol-3-yl)propanamido]-3-sulfanylpropanamido]-4-(methylsulfanyl)butanamido]-3-sulfanylpropanoic acid

Trp Met Cys Cys

(2R)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-3-(1H-indol-3-yl)propanamido]-4-(methylsulfanyl)butanamido]-3-sulfanylpropanamido]-3-sulfanylpropanoic acid

Tyr Cys Glu Gln

(4S)-4-[(2R)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-sulfanylpropanamido]-4-{[(1S)-3-carbamoyl-1-carboxypropyl]carbamoyl}butanoic acid

Tyr Cys Gln Glu

(2S)-2-[(2S)-2-[(2R)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-sulfanylpropanamido]-4-carbamoylbutanamido]pentanedioic acid

Tyr Asp Met Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-carboxypropanamido]-4-(methylsulfanyl)butanamido]-3-carbamoylpropanoic acid

Tyr Asp Asn Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-carboxypropanamido]-3-carbamoylpropanamido]-4-(methylsulfanyl)butanoic acid

Tyr Glu Cys Gln

(2S)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-carboxybutanamido]-3-sulfanylpropanamido]-4-carbamoylbutanoic acid

Tyr Glu Gln Cys

(4S)-4-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-{[(1S)-3-carbamoyl-1-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}propyl]carbamoyl}butanoic acid

Tyr Met Asp Asn

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanamido]-3-carboxypropanamido]-3-carbamoylpropanoic acid

Tyr Met Asn Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-(methylsulfanyl)butanamido]-3-carbamoylpropanamido]butanedioic acid

Tyr Asn Asp Met

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanamido]-3-carboxypropanamido]-4-(methylsulfanyl)butanoic acid

Tyr Asn Met Asp

(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-3-carbamoylpropanamido]-4-(methylsulfanyl)butanamido]butanedioic acid

Tyr Gln Cys Glu

(2S)-2-[(2R)-2-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-carbamoylbutanamido]-3-sulfanylpropanamido]pentanedioic acid

Tyr Gln Glu Cys

(4S)-4-[(2S)-2-[(2S)-2-amino-3-(4-hydroxyphenyl)propanamido]-4-carbamoylbutanamido]-4-{[(1R)-1-carboxy-2-sulfanylethyl]carbamoyl}butanoic acid

Domperidone maleate

5-chloro-1-{1-[3-(2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)propyl]piperidin-4-yl}-1,3-dihydro-2H-benzimidazol-2-one (2Z)-but-2-enedioate

C26H28ClN5O6 (541.1728)

D018377 - Neurotransmitter Agents > D015259 - Dopamine Agents > D018492 - Dopamine Antagonists D018373 - Peripheral Nervous System Agents > D001337 - Autonomic Agents D005765 - Gastrointestinal Agents > D000932 - Antiemetics D002491 - Central Nervous System Agents Domperidone (R33812) monomaleate is an orally active and selective dopamine-2 receptor antagonist. Domperidone monomaleate acts as an antiemetic and a prokinetic agent through its effects on the chemoreceptor trigger zone and motor function of the stomach and small intestine[1].

BENZENEACETIC ACID, 2-CHLORO-A-[[2-(2-THIENYL)ETHYL]AMINO]-, METHYL ESTER, (+)-, (1S)-7,7-DIMETHYL-2-OXOBICYCLO[2.2.1]HEPTANE-1-METHANESULFONATE

C25H32ClNO6S2 (541.1359)

Menogaril

2,6-Epoxy-2H-naphthaceno[1,2-b]oxocin-9,16-dione,4-(dimethylamino)-3,4,5,6,11,12,13,14-octahydro-3,5,8,10,13-pentahydroxy-11-methoxy-6,13-dimethyl-,(2R,3S,4R,5R,6R,11R,13R)-

C274 - Antineoplastic Agent > C2189 - Signal Transduction Inhibitor > C129824 - Antineoplastic Protein Inhibitor C274 - Antineoplastic Agent > C186664 - Cytotoxic Chemotherapeutic Agent > C259 - Antineoplastic Antibiotic C471 - Enzyme Inhibitor > C129825 - Antineoplastic Enzyme Inhibitor > C1748 - Topoisomerase Inhibitor C274 - Antineoplastic Agent > C186664 - Cytotoxic Chemotherapeutic Agent > C2842 - DNA Binding Agent D000970 - Antineoplastic Agents

p-[4,5-dihydro-3-methyl-4-[[4-methyl-3-[(p-tolylamino)sulphonyl]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid

C24H23N5O6S2 (541.109)

(+)-α-Benidipine

C28H32ClN3O6 (541.198)

[cyano-(3-phenoxyphenyl)methyl] 3-[(E)-3-(1,1,1,3,3,3-hexafluoropropan-2-yloxy)-3-oxoprop-1-enyl]-2,2-dimethylcyclopropane-1-carboxylate

C26H21F6NO5 (541.1324)

4-methoxyphenyl 3,4,6-tri-o-acetyl-2-deoxy-2-phthalimido-beta-d-glucopyranoside

C27H27NO11 (541.1584)

Tributyl(2-methoxyethyl)phosphonium Bis(trifluoromethanesulfonyl)imide

C17H34F6NO5PS2 (541.152)

N-(2,5-DIANILINOMETHYLENECYCLOPENTYLIDENE)DIPHENYLAMINIUM PERCHLORATE

C31H28ClN3O4 (541.1768)

tert-butyl (S)-6-(5-(7-bromo-9,9-difluoro-9H-fluoren-2-yl)-1H-imidazol-2-yl)-5-azaspiro[2.4]heptane-5-carboxylate

C27H26BrF2N3O2 (541.1176)

4-Methylumbelliferyl 2-Acetamido-2-deoxy-3-O-(b-D-galactopyranosyl)-a-D-galactopyranoside

C24H31NO13 (541.1795)

Tracid Rubine 5bl

C26H24N5O5S.Na (541.1396)

Filgotinib maleate

C25H27N5O7S (541.1631)

C471 - Enzyme Inhibitor > C1404 - Protein Kinase Inhibitor > C1967 - Tyrosine Kinase Inhibitor

Glycine, N-(2-((8-(bis(carboxymethyl)amino)-6-methoxy-2-quinolinyl)methoxy)-4-methylphenyl)-N-(carboxymethyl)-

C26H27N3O10 (541.1696)

CMP-8-amino-3,8-dideoxy-alpha-D-manno-oct-2-ulosonate(1-)

C17H26N4O14P- (541.1183)

A nucleotide-sugar oxoanion that is the conjugate base of CMP-8-amino-3,8-dideoxy-alpha-D-manno-oct-2-ulosonic acid; major species at pH 7.3.

(2S)-3-(1H-indol-3-yl)-2-[[(2R)-4-methyl-2-[[oxido-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyphosphoryl]amino]pentanoyl]amino]propanoate

C23H32N3O10P-2 (541.1825)

2-[(1S,3S,4aS,9aR)-6-[[(2-fluoroanilino)-oxomethyl]amino]-1-(hydroxymethyl)-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b]benzofuran-3-yl]-N-[(2,5-difluorophenyl)methyl]acetamide

C28H26F3N3O5 (541.1824)

(3R,6R,11R,15R,17S)-3-[5-(dimethylamino)-6-methyloxan-2-yl]oxy-4-hydroxy-6-methylspiro[12,16-dioxatetracyclo[8.7.0.03,8.011,15]heptadeca-1(10),3(8),4,6-tetraene-17,2-oxane]-2,4,9,13-tetrone

[(S)-cyano-(3-phenoxyphenyl)methyl] 3-[(E)-3-(1,1,1,3,3,3-hexafluoropropan-2-yloxy)-3-oxoprop-1-enyl]-2,2-dimethylcyclopropane-1-carboxylate

C26H21F6NO5 (541.1324)

auricin

An angucycline-like polyketide discovered in Streptomyces aureofaciens that is only stable at acidic pH.

ST 23:5;O7;Tau

C25H35NO10S (541.1982)

SRT 1720 (dihydrochloride)

C25H25Cl2N7OS (541.1218)

SRT 1720 dihydrochloride is a selective and orally active activator of SIRT1 with an EC50 of 0.10 μM, and shows less potent activities on SIRT2 and SIRT3[1].

methyl (1r,2r,4s)-4-[(4-amino-5-hydroxy-6-methyloxan-2-yl)oxy]-2-ethyl-2,5,7-trihydroxy-6,11-dioxo-3,4-dihydro-1h-tetracene-1-carboxylate

10-[(4-amino-5-hydroxy-6-methyloxan-2-yl)oxy]-6,8,11-trihydroxy-1-methoxy-8-(2-oxopropyl)-9,10-dihydro-7h-tetracene-5,12-dione

(2s,3r,6r,11'r,15'r)-3-{[5-(dimethylamino)-6-methyloxan-2-yl]oxy}-4'-hydroxy-6-methyl-12',16'-dioxaspiro[oxane-2,17'-tetracyclo[8.7.0.0³,⁸.0¹¹,¹⁵]heptadecane]-1'(10'),3',5',7'-tetraene-2',4,9',13'-tetrone

(2s,3r,6r,11'r,15'r)-3-{[5-(dimethylamino)-6-methyloxan-2-yl]oxy}-4'-hydroxy-6-methyl-12',16'-dioxaspiro[oxane-2,17'-tetracyclo[8.7.0.0³,⁸.0¹¹,¹⁵]heptadecane]-1'(10'),3',5',7'-tetraene-2',4,9',13'-tetrone

(8r,10r)-10-{[(2r,4r,5r,6r)-4-amino-5-hydroxy-6-methyloxan-2-yl]oxy}-6,8,11-trihydroxy-1-methoxy-8-(2-oxopropyl)-9,10-dihydro-7h-tetracene-5,12-dione

methyl 4-[(4-amino-5-hydroxy-6-methyloxan-2-yl)oxy]-2-ethyl-2,5,7-trihydroxy-6,11-dioxo-3,4-dihydro-1h-tetracene-1-carboxylate