Exact Mass: 502.25696560000006
Exact Mass Matches: 502.25696560000006
Found 94 metabolites which its exact mass value is equals to given mass value 502.25696560000006,
within given mass tolerance error 0.001 dalton. Try search metabolite list with more accurate mass tolerance error
0.0002 dalton.
Withaperuvin B
(6R)-6-[(1S)-1-hydroxy-1-[(1S,2R,6S,7S,8S,10R,14S,15S)-6,7,8,14-tetrahydroxy-2,15-dimethyl-3-oxotetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadeca-4,11-dien-14-yl]ethyl]-3,4-dimethyl-5,6-dihydro-2H-pyran-2-one
Withaperuvin B belongs to the class of organic compounds known as withanolides and derivatives. These are C28 steroids structurally characterized by an ergostane skeleton usually functionalized at carbons 1, 22, and 26 to form a lactone ring. Withaperuvin B is an extremely weak basic (essentially neutral) compound (based on its pKa). Withaperuvin is found in fruits. Withaperuvin is a constituent of Physalis peruviana (Cape gooseberry). From Physalis peruviana (Cape gooseberry). Withaperuvin B is found in fruits.
4beta-Hydroxywithanolide E
15-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-6,12,15-trihydroxy-2,16-dimethyl-8-oxapentacyclo[9.7.0.0^{2,7}.0^{7,9}.0^{12,16}]octadec-4-en-3-one
4beta-Hydroxywithanolide E is found in fruits. 4beta-Hydroxywithanolide E is a constituent of Physalis peruviana (Cape gooseberry). Constituent of Physalis peruviana (Cape gooseberry). 4beta-Hydroxywithanolide E is found in fruits.
Ixocarpalactone B
7,8,18-trihydroxy-3,4,8,10,14-pentamethyl-5,20-dioxaspiro[hexacyclo[11.9.0.0²,¹⁰.0⁴,⁹.0¹⁴,¹⁹.0¹⁹,²¹]docosane-6,2-oxolan]-16-ene-5,15-dione
Ixocarpalactone B is found in fruits. Ixocarpalactone B is a constituent of Physalis philadelphica (ixocarpa) (tomatillo) Constituent of Physalis philadelphica (ixocarpa) (tomatillo). Ixocarpalactone B is found in fruits.
28-Hydroxywithanolide E
12,15-dihydroxy-15-{1-hydroxy-1-[4-(hydroxymethyl)-5-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]ethyl}-2,16-dimethyl-8-oxapentacyclo[9.7.0.0²,⁷.0⁷,⁹.0¹²,¹⁶]octadec-4-en-3-one
28-Hydroxywithanolide E is found in fruits. 28-Hydroxywithanolide E is a constituent of Physalis peruviana (Cape gooseberry) Constituent of Physalis peruviana (Cape gooseberry). 28-Hydroxywithanolide E is found in fruits.
Cavipetin B
(2E)-4-{[(2E,6E,10E,14E)-16-{[(2E)-3-carboxyprop-2-enoyl]oxy}-2,6,10,14-tetramethylhexadeca-2,6,10,14-tetraen-1-yl]oxy}-4-oxobut-2-enoic acid
Cavipetin B is found in mushrooms. Cavipetin B is a constituent of the edible mushroom (Boletinus cavipes) Constituent of the edible mushroom (Boletinus cavipes). Cavipetin B is found in mushrooms.
Withaperuvin G
16-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-13,16-dihydroxy-2,17-dimethyl-5,9-dioxahexacyclo[10.7.0.0²,⁸.0⁴,⁶.0⁸,¹⁰.0¹³,¹⁷]nonadecan-3-one
Withaperuvin G is found in fruits. Withaperuvin G is a constituent of Physalis peruviana (Cape gooseberry). Constituent of Physalis peruviana (Cape gooseberry). Withaperuvin G is found in fruits.
Withaperuvin F
7-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-7,16,17-trihydroxy-8,12-dimethyl-18-oxapentacyclo[13.2.1.0³,¹¹.0⁴,⁸.0¹²,¹⁷]octadec-4-en-13-one
Withaperuvin F is found in fruits. Withaperuvin F is a constituent of Physalis peruviana (Cape gooseberry)
7-O-Succinyl macrolactin A
4-[(14,16-dihydroxy-24-methyl-2-oxo-1-oxacyclotetracosa-3,5,9,11,17,19-hexaen-8-yl)oxy]-4-oxobutanoic acid
2,3:5,6-Diepoxy-14,17,20-trihydroxy-1-oxowith-24-enolide
2,3:5,6-Diepoxy-14,17,20-trihydroxy-1-oxowith-24-enolide
3,6-Epoxy-4,5,17,20-tetrahydroxy-1-oxowitha-14,24-dienolide
3,6-Epoxy-4,5,17,20-tetrahydroxy-1-oxowitha-14,24-dienolide
yanuthone D
yanuthone D
A class I yanuthone that is yanuthone E in which the secondary hydroxy group has been oxidised to the corresponding ketone. It is the only one of the sixteen yanuthones described up to 2015 to display strong antimicrobial activity.
(20S,22S)-12alpha,22-epoxy-5alpha,6beta,12beta,17beta-tetrahydroxy-1-oxo-witha-2,24-dien-26,22-olide|jaborosalactone 27
(20S,22S)-12alpha,22-epoxy-5alpha,6beta,12beta,17beta-tetrahydroxy-1-oxo-witha-2,24-dien-26,22-olide|jaborosalactone 27
amplexicoside G|amplexogenin A 3-O-beta-D-oleandropyranoside
amplexicoside G|amplexogenin A 3-O-beta-D-oleandropyranoside
(17S,20R,22R)-18,20-epoxy-5alpha,6beta,15alpha,18beta-tetrahydroxy-1-oxowitha-2,24-dien-26,22-olide|physaminimin C
(17S,20R,22R)-18,20-epoxy-5alpha,6beta,15alpha,18beta-tetrahydroxy-1-oxowitha-2,24-dien-26,22-olide|physaminimin C
3-O-beta-D-thevetopyranosyl-14,16:15,20:18,20-triepoxy-14,15-secopregn-4,6,8(14)triene|stauntosaponin B
3-O-beta-D-thevetopyranosyl-14,16:15,20:18,20-triepoxy-14,15-secopregn-4,6,8(14)triene|stauntosaponin B
1,3-dideacetylkhivorin|3alpha,7alpha-dideacetylkhivorin
1,3-dideacetylkhivorin|3alpha,7alpha-dideacetylkhivorin
14alpha,17alpha-dihydroxywithanolide R|6alpha,7alpha-epoxy-5alpha,14alpha,17alpha,23beta-tetrahydroxy-1-oxo-22S-witha-2,24-dienolide
14alpha,17alpha-dihydroxywithanolide R|6alpha,7alpha-epoxy-5alpha,14alpha,17alpha,23beta-tetrahydroxy-1-oxo-22S-witha-2,24-dienolide
(20R,22R,23S)-5alpha,6beta,12beta,17beta,22-pentahydroxy-1-oxo-12,23-cycloergosta-2,24-dien-26,23-olide|jaborosalactone 13
(20R,22R,23S)-5alpha,6beta,12beta,17beta,22-pentahydroxy-1-oxo-12,23-cycloergosta-2,24-dien-26,23-olide|jaborosalactone 13
(20S,22S,23S,24S,25S,26S)-5beta,6beta,12alpha,22,23,26,24,25-tetraepoxy-12beta,17beta,26-trihydroxyergosta-2-en-1-one|jaborosalactol 24
(20S,22S,23S,24S,25S,26S)-5beta,6beta,12alpha,22,23,26,24,25-tetraepoxy-12beta,17beta,26-trihydroxyergosta-2-en-1-one|jaborosalactol 24
NCI60_001790
(1S,2R,6S,7R,9R,11R,12R,15S,16S)-15-[(1S)-1-[(2R)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]-1-hydroxyethyl]-6,12,15-trihydroxy-2,16-dimethyl-8-oxapentacyclo[9.7.0.02,7.07,9.012,16]octadec-4-en-3-one
4beta-Hydroxywithanolide E is a withanolide. 4beta-Hydroxywithanolide E is a natural product found in Physalis peruviana, Physalis viscosa, and Physalis cinerascens with data available.
C28H38O8_Methyl 3-acetoxy-16-hydroxy-4,4,8,12,16-pentamethyl-15,17,19-trioxoandrost-11-ene-14-carboxylate
NCGC00384939-01_C28H38O8_Methyl 3-acetoxy-16-hydroxy-4,4,8,12,16-pentamethyl-15,17,19-trioxoandrost-11-ene-14-carboxylate
Lys Met Pro Gln
(2S)-4-carbamoyl-2-{[(2S)-1-[(2S)-2-[(2S)-2,6-diaminohexanamido]-4-(methylsulfanyl)butanoyl]pyrrolidin-2-yl]formamido}butanoic acid
Lys Met Gln Pro
(2S)-1-[(2S)-4-carbamoyl-2-[(2S)-2-[(2S)-2,6-diaminohexanamido]-4-(methylsulfanyl)butanamido]butanoyl]pyrrolidine-2-carboxylic acid
Lys Pro Met Gln
(2S)-4-carbamoyl-2-[(2S)-2-{[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidin-2-yl]formamido}-4-(methylsulfanyl)butanamido]butanoic acid
Lys Pro Gln Met
(2S)-2-[(2S)-4-carbamoyl-2-{[(2S)-1-[(2S)-2,6-diaminohexanoyl]pyrrolidin-2-yl]formamido}butanamido]-4-(methylsulfanyl)butanoic acid
Lys Gln Met Pro
(2S)-1-[(2S)-2-[(2S)-4-carbamoyl-2-[(2S)-2,6-diaminohexanamido]butanamido]-4-(methylsulfanyl)butanoyl]pyrrolidine-2-carboxylic acid
Lys Gln Pro Met
(2S)-2-{[(2S)-1-[(2S)-4-carbamoyl-2-[(2S)-2,6-diaminohexanamido]butanoyl]pyrrolidin-2-yl]formamido}-4-(methylsulfanyl)butanoic acid
Met Lys Pro Gln
(2S)-2-{[(2S)-1-[(2S)-6-amino-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]hexanoyl]pyrrolidin-2-yl]formamido}-4-carbamoylbutanoic acid
Met Lys Gln Pro
(2S)-1-[(2S)-2-[(2S)-6-amino-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]hexanamido]-4-carbamoylbutanoyl]pyrrolidine-2-carboxylic acid
Met Pro Lys Gln
(2S)-2-[(2S)-6-amino-2-{[(2S)-1-[(2S)-2-amino-4-(methylsulfanyl)butanoyl]pyrrolidin-2-yl]formamido}hexanamido]-4-carbamoylbutanoic acid
Met Pro Gln Lys
(2S)-6-amino-2-[(2S)-2-{[(2S)-1-[(2S)-2-amino-4-(methylsulfanyl)butanoyl]pyrrolidin-2-yl]formamido}-4-carbamoylbutanamido]hexanoic acid
Met Gln Lys Pro
(2S)-1-[(2S)-6-amino-2-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-4-carbamoylbutanamido]hexanoyl]pyrrolidine-2-carboxylic acid
Met Gln Pro Lys
(2S)-6-amino-2-{[(2S)-1-[(2S)-2-[(2S)-2-amino-4-(methylsulfanyl)butanamido]-4-carbamoylbutanoyl]pyrrolidin-2-yl]formamido}hexanoic acid
Pro Lys Met Gln
(2S)-2-[(2S)-2-[(2S)-6-amino-2-[(2S)-pyrrolidin-2-ylformamido]hexanamido]-4-(methylsulfanyl)butanamido]-4-carbamoylbutanoic acid
Pro Lys Gln Met
(2S)-2-[(2S)-2-[(2S)-6-amino-2-[(2S)-pyrrolidin-2-ylformamido]hexanamido]-4-carbamoylbutanamido]-4-(methylsulfanyl)butanoic acid
Pro Met Lys Gln
(2S)-2-[(2S)-6-amino-2-[(2S)-4-(methylsulfanyl)-2-[(2S)-pyrrolidin-2-ylformamido]butanamido]hexanamido]-4-carbamoylbutanoic acid
Pro Met Gln Lys
(2S)-6-amino-2-[(2S)-4-carbamoyl-2-[(2S)-4-(methylsulfanyl)-2-[(2S)-pyrrolidin-2-ylformamido]butanamido]butanamido]hexanoic acid
Pro Gln Lys Met
(2S)-2-[(2S)-6-amino-2-[(2S)-4-carbamoyl-2-[(2S)-pyrrolidin-2-ylformamido]butanamido]hexanamido]-4-(methylsulfanyl)butanoic acid
Pro Gln Met Lys
(2S)-6-amino-2-[(2S)-2-[(2S)-4-carbamoyl-2-[(2S)-pyrrolidin-2-ylformamido]butanamido]-4-(methylsulfanyl)butanamido]hexanoic acid
Gln Lys Met Pro
(2S)-1-[(2S)-2-[(2S)-6-amino-2-[(2S)-2-amino-4-carbamoylbutanamido]hexanamido]-4-(methylsulfanyl)butanoyl]pyrrolidine-2-carboxylic acid
Gln Lys Pro Met
(2S)-2-{[(2S)-1-[(2S)-6-amino-2-[(2S)-2-amino-4-carbamoylbutanamido]hexanoyl]pyrrolidin-2-yl]formamido}-4-(methylsulfanyl)butanoic acid
Gln Met Lys Pro
(2S)-1-[(2S)-6-amino-2-[(2S)-2-[(2S)-2-amino-4-carbamoylbutanamido]-4-(methylsulfanyl)butanamido]hexanoyl]pyrrolidine-2-carboxylic acid
Gln Met Pro Lys
(2S)-6-amino-2-{[(2S)-1-[(2S)-2-[(2S)-2-amino-4-carbamoylbutanamido]-4-(methylsulfanyl)butanoyl]pyrrolidin-2-yl]formamido}hexanoic acid
Gln Pro Lys Met
(2S)-2-[(2S)-6-amino-2-{[(2S)-1-[(2S)-2-amino-4-carbamoylbutanoyl]pyrrolidin-2-yl]formamido}hexanamido]-4-(methylsulfanyl)butanoic acid
Gln Pro Met Lys
(2S)-6-amino-2-[(2S)-2-{[(2S)-1-[(2S)-2-amino-4-carbamoylbutanoyl]pyrrolidin-2-yl]formamido}-4-(methylsulfanyl)butanamido]hexanoic acid
Cavipetin B
(2E)-4-{[(2E,6E,10E,14E)-16-{[(2E)-3-carboxyprop-2-enoyl]oxy}-2,6,10,14-tetramethylhexadeca-2,6,10,14-tetraen-1-yl]oxy}-4-oxobut-2-enoic acid
28-Hydroxywithanolide E
12,15-dihydroxy-15-{1-hydroxy-1-[4-(hydroxymethyl)-5-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]ethyl}-2,16-dimethyl-8-oxapentacyclo[9.7.0.0^{2,7}.0^{7,9}.0^{12,16}]octadec-4-en-3-one
Withaperuvin G
16-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-13,16-dihydroxy-2,17-dimethyl-5,9-dioxahexacyclo[10.7.0.0^{2,8}.0^{4,6}.0^{8,10}.0^{13,17}]nonadecan-3-one
4b-Hydroxywithanolide e
15-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-6,12,15-trihydroxy-2,16-dimethyl-8-oxapentacyclo[9.7.0.0^{2,7}.0^{7,9}.0^{12,16}]octadec-4-en-3-one
Ixocarpalactone B
7,8,18-trihydroxy-3,4,8,10,14-pentamethyl-5,20-dioxaspiro[hexacyclo[11.9.0.0^{2,10}.0^{4,9}.0^{14,19}.0^{19,21}]docosane-6,2-oxolan]-16-ene-5,15-dione
Withaperuvin F
7-[1-(4,5-dimethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-1-hydroxyethyl]-7,16,17-trihydroxy-8,12-dimethyl-18-oxapentacyclo[13.2.1.0^{3,11}.0^{4,8}.0^{12,17}]octadec-4-en-13-one
Withaperuvin B
17S,20S,22R-4beta,5beta,6alpha,17beta,20alpha-pentahydroxy-1-oxo-ergosta-2,14,24-trienolide
Withalongolide C
5beta,6beta:22R,26-diepoxyergosta-4beta,11beta,19,27-tetrahydroxy-2,24-diene-1,26-dione
Ergosta-2,14,24-trien-26-oic acid, 4,5,6,17,20,22-hexahydroxy-1-oxo-, delta-lactone, (4beta,5beta,6alpha,17alpha,22R)-
Ergosta-2,14,24-trien-26-oic acid, 4,5,6,17,20,22-hexahydroxy-1-oxo-, delta-lactone, (4beta,5beta,6alpha,17alpha,22R)-
4-[[(3E,5E,9E,11Z,17E,19E)-14,16-dihydroxy-24-methyl-2-oxo-1-oxacyclotetracosa-3,5,9,11,17,19-hexaen-8-yl]oxy]-4-oxobutanoic acid
4-[[(3E,5E,9E,11Z,17E,19E)-14,16-dihydroxy-24-methyl-2-oxo-1-oxacyclotetracosa-3,5,9,11,17,19-hexaen-8-yl]oxy]-4-oxobutanoic acid
5-({(1S,6R)-2,5-dioxo-6-[(2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-yl]-7-oxabicyclo[4.1.0]hept-3-en-3-yl}methoxy)-3-hydroxy-3-methyl-5-oxopentanoic acid
5-({(1S,6R)-2,5-dioxo-6-[(2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-yl]-7-oxabicyclo[4.1.0]hept-3-en-3-yl}methoxy)-3-hydroxy-3-methyl-5-oxopentanoic acid
[O-[1-O,2-O-Bis(1-oxo-2,4-octadienyl)-L-glycero-3-phospho]choline]anion
[O-[1-O,2-O-Bis(1-oxo-2,4-octadienyl)-L-glycero-3-phospho]choline]anion
C24H41NO8P+ (502.25696560000006)
(3ar,3bs,5ar,7s,9as,9br,11ar)-7-(acetyloxy)-1-hydroxy-3a-(methoxycarbonyl)-2,3b,6,6,11,11a-hexamethyl-3-oxo-4h,5h,5ah,7h,8h,9h,9bh-cyclopenta[a]phenanthrene-9a-carboxylic acid
(3ar,3bs,5ar,7s,9as,9br,11ar)-7-(acetyloxy)-1-hydroxy-3a-(methoxycarbonyl)-2,3b,6,6,11,11a-hexamethyl-3-oxo-4h,5h,5ah,7h,8h,9h,9bh-cyclopenta[a]phenanthrene-9a-carboxylic acid
(1s,2s,4r,5r,10r,11s,13s,15s,16s,17r,20s)-4,5,13,17-tetrahydroxy-4',5',10,16,20-pentamethyl-3'h-14-oxaspiro[pentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icosane-15,2'-pyra]-7-ene-6',9-dione
(1s,2s,4r,5r,10r,11s,13s,15s,16s,17r,20s)-4,5,13,17-tetrahydroxy-4',5',10,16,20-pentamethyl-3'h-14-oxaspiro[pentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icosane-15,2'-pyra]-7-ene-6',9-dione
(1s,2r,4s,7r,8s,11r,12s,13s,15r,17s,19r)-7-(furan-3-yl)-15,19-dihydroxy-1,8,12,16,16-pentamethyl-5-oxo-3,6-dioxapentacyclo[9.8.0.0²,⁴.0²,⁸.0¹²,¹⁷]nonadecan-13-yl acetate
(1s,2r,4s,7r,8s,11r,12s,13s,15r,17s,19r)-7-(furan-3-yl)-15,19-dihydroxy-1,8,12,16,16-pentamethyl-5-oxo-3,6-dioxapentacyclo[9.8.0.0²,⁴.0²,⁸.0¹²,¹⁷]nonadecan-13-yl acetate
(9r,10r,11r)-11-hydroxy-4,5,14,15,16-pentamethoxy-9,10-dimethyltricyclo[10.4.0.0²,⁷]hexadeca-1(12),2(7),3,5,13,15-hexaen-3-yl (2s)-2-methylbutanoate
(9r,10r,11r)-11-hydroxy-4,5,14,15,16-pentamethoxy-9,10-dimethyltricyclo[10.4.0.0²,⁷]hexadeca-1(12),2(7),3,5,13,15-hexaen-3-yl (2s)-2-methylbutanoate
8-[(5-hydroxy-4-methoxy-6-methyloxan-2-yl)oxy]-5,19-dimethyl-15,18,20-trioxahexacyclo[14.5.1.0¹,¹⁴.0⁴,¹³.0⁵,¹⁰.0¹⁹,²²]docosa-9,11,13-trien-7-ol
8-[(5-hydroxy-4-methoxy-6-methyloxan-2-yl)oxy]-5,19-dimethyl-15,18,20-trioxahexacyclo[14.5.1.0¹,¹⁴.0⁴,¹³.0⁵,¹⁰.0¹⁹,²²]docosa-9,11,13-trien-7-ol
4-[(14-hydroxy-24-methyl-2,16-dioxo-1-oxacyclotetracosa-3,5,9,11,19-pentaen-8-yl)oxy]-4-oxobutanoic acid
4-[(14-hydroxy-24-methyl-2,16-dioxo-1-oxacyclotetracosa-3,5,9,11,19-pentaen-8-yl)oxy]-4-oxobutanoic acid
(2ar,3r,4r,5s,5ar,6as,6br,10ar,11r,12as,12bs,12cs)-2a,4,5a,10a,11-pentahydroxy-3,3',4',6b,12c-pentamethyl-2,3,4,6,6a,10,11,12,12a,12b-decahydro-1h-spiro[cyclohexa[j]aceanthrylene-5,2'-furan]-5',7-dione
(2ar,3r,4r,5s,5ar,6as,6br,10ar,11r,12as,12bs,12cs)-2a,4,5a,10a,11-pentahydroxy-3,3',4',6b,12c-pentamethyl-2,3,4,6,6a,10,11,12,12a,12b-decahydro-1h-spiro[cyclohexa[j]aceanthrylene-5,2'-furan]-5',7-dione
(1s,2s,4r,5r,10r,11s,13s,16r,17r,20s)-16-[(2r)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]-4,5,13,17-tetrahydroxy-10,20-dimethyl-14-oxapentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icos-7-en-9-one
(1s,2s,4r,5r,10r,11s,13s,16r,17r,20s)-16-[(2r)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]-4,5,13,17-tetrahydroxy-10,20-dimethyl-14-oxapentacyclo[11.6.1.0²,¹¹.0⁵,¹⁰.0¹⁷,²⁰]icos-7-en-9-one
(2e)-4-{[(2e,10e,14e)-16-{[(2e)-3-carboxyprop-2-enoyl]oxy}-2,6,10,14-tetramethylhexadeca-2,6,10,14-tetraen-1-yl]oxy}-4-oxobut-2-enoic acid
(2e)-4-{[(2e,10e,14e)-16-{[(2e)-3-carboxyprop-2-enoyl]oxy}-2,6,10,14-tetramethylhexadeca-2,6,10,14-tetraen-1-yl]oxy}-4-oxobut-2-enoic acid