Exact Mass: 762.3278002
Exact Mass Matches: 762.3278002
Found 55 metabolites which its exact mass value is equals to given mass value 762.3278002,
within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error
0.01 dalton.
5alpha-acetyloxy-8alpha,9alpha-dinicotinyloxy-15beta-hydroxy-7beta-isobutanoyloxy-3beta-propanoyloxyjatropha-6(17),11E-diene-14-one|euphodendrophane I
5alpha-acetyloxy-8alpha,9alpha-dinicotinyloxy-15beta-hydroxy-7beta-isobutanoyloxy-3beta-propanoyloxyjatropha-6(17),11E-diene-14-one|euphodendrophane I
(2S*,3S*,6S*,7R*,8R*,9S*,13S*,14S*,15R*)-8,9,14,15-tetraacetoxy-3,7-dibenzoyloxy-6-hydroxyjatropha-4E,11E-diene
(2S*,3S*,6S*,7R*,8R*,9S*,13S*,14S*,15R*)-8,9,14,15-tetraacetoxy-3,7-dibenzoyloxy-6-hydroxyjatropha-4E,11E-diene
Trp Trp Trp Trp
(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-(1H-indol-3-yl)propanamido]-3-(1H-indol-3-yl)propanamido]-3-(1H-indol-3-yl)propanamido]-3-(1H-indol-3-yl)propanoic acid
Dehydroophioxanthin
3,3-Dihydroxy-7,8-didehydro-5,6,5,6-tetrahydro-beta,beta-carotene-4,4-diyl disulphate
C40H58O10S2 (762.3471208000001)
(4S,7R,8S,11S,18S,21R,22S,25S)-11-benzyl-4-[(2S)-butan-2-yl]-7,21,25-trimethyl-18-propan-2-yl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octazapentacyclo[24.2.1.15,8.112,15.119,22]dotriaconta-1(28),5(32),12(31),14,19(30),26(29)-hexaene-2,9,16,23-tetrone
(4S,7R,8S,11S,18S,21R,22S,25S)-11-benzyl-4-[(2S)-butan-2-yl]-7,21,25-trimethyl-18-propan-2-yl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octazapentacyclo[24.2.1.15,8.112,15.119,22]dotriaconta-1(28),5(32),12(31),14,19(30),26(29)-hexaene-2,9,16,23-tetrone
methyl beta-D-galactopyranosyl-(1->4)-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1->3)-beta-D-galactopyranosyl-(1->4)-2-(acetylamino)-2-deoxy-beta-D-glucopyranoside
methyl beta-D-galactopyranosyl-(1->4)-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1->3)-beta-D-galactopyranosyl-(1->4)-2-(acetylamino)-2-deoxy-beta-D-glucopyranoside
(3r,3ar,4r,5s,6s,7as)-6-[(2s,3r,4r,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2s,3s)-2-hydroxy-3-methylpentanoate
(3r,3ar,4r,5s,6s,7as)-6-[(2s,3r,4r,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2s,3s)-2-hydroxy-3-methylpentanoate
(2r)-6-[(1r,5s,6r)-6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl]-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
(2r)-6-[(1r,5s,6r)-6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl]-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
[(2r,3r,4s,5r,6s)-3,4,5-tris(acetyloxy)-6-{[(4br,8ar,10s)-10-(acetyloxy)-4b-[(acetyloxy)methyl]-4-hydroxy-2-isopropyl-8,8-dimethyl-7-oxo-6,8a,9,10-tetrahydro-5h-phenanthren-3-yl]oxy}oxan-2-yl]methyl acetate
[(2r,3r,4s,5r,6s)-3,4,5-tris(acetyloxy)-6-{[(4br,8ar,10s)-10-(acetyloxy)-4b-[(acetyloxy)methyl]-4-hydroxy-2-isopropyl-8,8-dimethyl-7-oxo-6,8a,9,10-tetrahydro-5h-phenanthren-3-yl]oxy}oxan-2-yl]methyl acetate
(1r,3s,3ar,4r,5r,6r,7as)-1-(acetyloxy)-6-[(1s,2r,3r,4s,6s)-4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]nonan-3-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-hexahydroinden-4-yl (3r)-3-methyl-2-oxopentanoate
(1r,3s,3ar,4r,5r,6r,7as)-1-(acetyloxy)-6-[(1s,2r,3r,4s,6s)-4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]nonan-3-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-hexahydroinden-4-yl (3r)-3-methyl-2-oxopentanoate
(4r,5s,8s,11s,18r,19s,22s,25r)-11-benzyl-22-[(2s)-butan-2-yl]-8-isopropyl-4,18,25-trimethyl-3,17-dioxa-13,27-dithia-7,10,21,24,29,30,31,32-octaazapentacyclo[24.2.1.1²,⁵.1¹²,¹⁵.1¹⁶,¹⁹]dotriaconta-1(28),2(32),6,9,12(31),14,16(30),20,23,26(29)-decaene-6,9,20,23-tetrol
(4r,5s,8s,11s,18r,19s,22s,25r)-11-benzyl-22-[(2s)-butan-2-yl]-8-isopropyl-4,18,25-trimethyl-3,17-dioxa-13,27-dithia-7,10,21,24,29,30,31,32-octaazapentacyclo[24.2.1.1²,⁵.1¹²,¹⁵.1¹⁶,¹⁹]dotriaconta-1(28),2(32),6,9,12(31),14,16(30),20,23,26(29)-decaene-6,9,20,23-tetrol
1-(acetyloxy)-6-[4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]nonan-3-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-hexahydroinden-4-yl 3-methyl-2-oxopentanoate
1-(acetyloxy)-6-[4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]nonan-3-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-hexahydroinden-4-yl 3-methyl-2-oxopentanoate
(4r,7r,8s,11s,18r,21r,22r,25r)-11-benzyl-4-[(2r)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(4r,7r,8s,11s,18r,21r,22r,25r)-11-benzyl-4-[(2r)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(4s,7r,8s,11r,18s,21r,22s,25r)-11-benzyl-4-[(2s)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(4s,7r,8s,11r,18s,21r,22s,25r)-11-benzyl-4-[(2s)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(11z)-7-hydroxy-3',6,7,14-tetramethyl-2,9-dioxa-14-azaspiro[bicyclo[9.5.1]heptadecane-5,2'-oxiran]-11-ene-3,8,17-trione 7'-hydroxy-3,6',7',14'-tetramethyl-3',8'-dioxo-2',9'-dioxa-14'-azaspiro[oxirane-2,5'-tricyclo[9.5.1.0¹⁴,¹⁷]heptadecan]-11'-en-14'-ium-17'-olate
(11z)-7-hydroxy-3',6,7,14-tetramethyl-2,9-dioxa-14-azaspiro[bicyclo[9.5.1]heptadecane-5,2'-oxiran]-11-ene-3,8,17-trione 7'-hydroxy-3,6',7',14'-tetramethyl-3',8'-dioxo-2',9'-dioxa-14'-azaspiro[oxirane-2,5'-tricyclo[9.5.1.0¹⁴,¹⁷]heptadecan]-11'-en-14'-ium-17'-olate
(4s,7r,8s,11r,18s,21r,22s,25r)-11-benzyl-4-[(2r)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(4s,7r,8s,11r,18s,21r,22s,25r)-11-benzyl-4-[(2r)-butan-2-yl]-18-isopropyl-7,21,25-trimethyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
6-[5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl 2-hydroxy-3-methylpentanoate
6-[5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl 2-hydroxy-3-methylpentanoate
(3s,3ar,4r,5r,6r,7as)-6-[(2s,3r,4r,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2r,3r)-2-hydroxy-3-methylpentanoate
(3s,3ar,4r,5r,6r,7as)-6-[(2s,3r,4r,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2r,3r)-2-hydroxy-3-methylpentanoate
11-benzyl-8-isopropyl-4,18,25-trimethyl-22-(sec-butyl)-3,17-dioxa-13,27-dithia-7,10,21,24,29,30,31,32-octaazapentacyclo[24.2.1.1²,⁵.1¹²,¹⁵.1¹⁶,¹⁹]dotriaconta-1(28),2(32),6,9,12(31),14,16(30),20,23,26(29)-decaene-6,9,20,23-tetrol
11-benzyl-8-isopropyl-4,18,25-trimethyl-22-(sec-butyl)-3,17-dioxa-13,27-dithia-7,10,21,24,29,30,31,32-octaazapentacyclo[24.2.1.1²,⁵.1¹²,¹⁵.1¹⁶,¹⁹]dotriaconta-1(28),2(32),6,9,12(31),14,16(30),20,23,26(29)-decaene-6,9,20,23-tetrol
(4s,7r,8s,11r,18s,22s,25r)-25-benzyl-4,11,18-triisopropyl-7-methyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(4s,7r,8s,11r,18s,22s,25r)-25-benzyl-4,11,18-triisopropyl-7-methyl-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
11-benzyl-18-isopropyl-7,21,25-trimethyl-4-(sec-butyl)-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
11-benzyl-18-isopropyl-7,21,25-trimethyl-4-(sec-butyl)-6,20-dioxa-13,27-dithia-3,10,17,24,29,30,31,32-octaazapentacyclo[24.2.1.1⁵,⁸.1¹²,¹⁵.1¹⁹,²²]dotriaconta-1(28),2,5(32),9,12(31),14,16,19(30),23,26(29)-decaene-2,9,16,23-tetrol
(2r,3r,3as,4r,6r,8r,12r,13ar)-3,4,6,13a-tetrakis(acetyloxy)-2,9,9,12-tetramethyl-5-methylidene-13-oxo-2-(pyridine-3-carbonyloxy)-1h,3h,3ah,4h,6h,7h,8h,12h-cyclopenta[12]annulen-8-yl pyridine-3-carboxylate
(2r,3r,3as,4r,6r,8r,12r,13ar)-3,4,6,13a-tetrakis(acetyloxy)-2,9,9,12-tetramethyl-5-methylidene-13-oxo-2-(pyridine-3-carbonyloxy)-1h,3h,3ah,4h,6h,7h,8h,12h-cyclopenta[12]annulen-8-yl pyridine-3-carboxylate
2-(benzoyloxy)-10,11,22-trihydroxy-9-(hydroxymethyl)-4-isopropyl-13,15-dimethyl-8,24,26,27-tetraoxaheptacyclo[12.10.1.1⁴,²³.1⁵,²³.0¹,⁶.0⁷,⁹.0¹¹,²⁵]heptacosan-12-yl benzoate
2-(benzoyloxy)-10,11,22-trihydroxy-9-(hydroxymethyl)-4-isopropyl-13,15-dimethyl-8,24,26,27-tetraoxaheptacyclo[12.10.1.1⁴,²³.1⁵,²³.0¹,⁶.0⁷,⁹.0¹¹,²⁵]heptacosan-12-yl benzoate
(2s)-6-[(1r,5s,6r)-6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl]-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
(2s)-6-[(1r,5s,6r)-6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl]-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
2,6,8,9-tetrakis(acetyloxy)-4-(benzoyloxy)-3a-(2-hydroxypropan-2-yl)-1,8a-dimethyl-5-oxo-2h,3h,4h,4ah,6h,7h,8h,9h,10h-cyclohexa[f]azulen-10-yl benzoate
2,6,8,9-tetrakis(acetyloxy)-4-(benzoyloxy)-3a-(2-hydroxypropan-2-yl)-1,8a-dimethyl-5-oxo-2h,3h,4h,4ah,6h,7h,8h,9h,10h-cyclohexa[f]azulen-10-yl benzoate
6-{6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl}-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
6-{6-[2,4-dihydroxy-3-(3-methylbut-2-en-1-yl)benzoyl]-5-(2,4-dihydroxyphenyl)-3-(4-methylpent-3-en-1-yl)cyclohex-2-en-1-yl}-2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-2,3-dihydro-1-benzopyran-4-one
3a,4,9,10-tetrakis(acetyloxy)-11-(benzoyloxy)-12-hydroxy-2,5,8,8,12-pentamethyl-1h,2h,3h,4h,5h,9h,10h,11h-cyclopenta[12]annulen-1-yl benzoate
3a,4,9,10-tetrakis(acetyloxy)-11-(benzoyloxy)-12-hydroxy-2,5,8,8,12-pentamethyl-1h,2h,3h,4h,5h,9h,10h,11h-cyclopenta[12]annulen-1-yl benzoate
(1r,2r,4r,5r,6r,7s,9r,10r,11s,12s,13r,14r,15r,22r,23r,25s)-12-(benzoyloxy)-10,11,22-trihydroxy-9-(hydroxymethyl)-4-isopropyl-13,15-dimethyl-8,24,26,27-tetraoxaheptacyclo[12.10.1.1⁴,²³.1⁵,²³.0¹,⁶.0⁷,⁹.0¹¹,²⁵]heptacosan-2-yl benzoate
(1r,2r,4r,5r,6r,7s,9r,10r,11s,12s,13r,14r,15r,22r,23r,25s)-12-(benzoyloxy)-10,11,22-trihydroxy-9-(hydroxymethyl)-4-isopropyl-13,15-dimethyl-8,24,26,27-tetraoxaheptacyclo[12.10.1.1⁴,²³.1⁵,²³.0¹,⁶.0⁷,⁹.0¹¹,²⁵]heptacosan-2-yl benzoate
(2s,3s,5s,6r,7r,8s,12s,13s,13ar)-7,8,13,13a-tetrakis(acetyloxy)-3-(benzoyloxy)-5-hydroxy-2,5,9,9,12-pentamethyl-1h,2h,3h,6h,7h,8h,12h,13h-cyclopenta[12]annulen-6-yl benzoate
(2s,3s,5s,6r,7r,8s,12s,13s,13ar)-7,8,13,13a-tetrakis(acetyloxy)-3-(benzoyloxy)-5-hydroxy-2,5,9,9,12-pentamethyl-1h,2h,3h,6h,7h,8h,12h,13h-cyclopenta[12]annulen-6-yl benzoate
(3r,3ar,4r,5r,6s,7as)-6-[(2s,3r,4s,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2r,3r)-2-hydroxy-3-methylpentanoate
(3r,3ar,4r,5r,6s,7as)-6-[(2s,3r,4s,5s)-5-(acetyloxy)-2-[(acetyloxy)methyl]-3-(2-methoxy-2-oxoethyl)-2,4-dimethyl-7-oxooxepan-4-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxo-tetrahydro-2h-inden-4-yl (2r,3r)-2-hydroxy-3-methylpentanoate
(2s,3as,4s,4as,6s,8s,8as,9r,10r)-2,6,8,9-tetrakis(acetyloxy)-10-(benzoyloxy)-3a-(2-hydroxypropan-2-yl)-1,8a-dimethyl-5-oxo-2h,3h,4h,4ah,6h,7h,8h,9h,10h-cyclohexa[f]azulen-4-yl benzoate
(2s,3as,4s,4as,6s,8s,8as,9r,10r)-2,6,8,9-tetrakis(acetyloxy)-10-(benzoyloxy)-3a-(2-hydroxypropan-2-yl)-1,8a-dimethyl-5-oxo-2h,3h,4h,4ah,6h,7h,8h,9h,10h-cyclohexa[f]azulen-4-yl benzoate
(8r)-8-ethyl-1,6,7,8,11-pentahydroxy-10-{[4-hydroxy-5-({4-hydroxy-5-[(5-hydroxy-6-methyloxan-2-yl)oxy]-6-methyloxan-2-yl}oxy)-6-methyloxan-2-yl]oxy}-7,9,10,11a-tetrahydro-5ah-tetracene-5,12-dione
(8r)-8-ethyl-1,6,7,8,11-pentahydroxy-10-{[4-hydroxy-5-({4-hydroxy-5-[(5-hydroxy-6-methyloxan-2-yl)oxy]-6-methyloxan-2-yl}oxy)-6-methyloxan-2-yl]oxy}-7,9,10,11a-tetrahydro-5ah-tetracene-5,12-dione