| 1 | 3776-39-4 | 延命草素 | Enmein | C20H26O6
| 二萜;对照品;中药对照品;标准品 -中药标准品 | |
| 2 | 10391-09-0 | 诺多星 | Nodosin | C20H26O6
| 二萜;标准品;对照品;植物提取物;中药对照品;标准品 -对照药材 | |
| 3 | 63521-56-2 | 鞘蕊酮S | Coleon S | C20H26O6
| | |
| 4 | 52617-37-5 | 冬凌草乙素 | ponicidin | C20H26O6
| 二萜;标准品;对照品;中药对照品;植物提取物;对照品,标准品;分析试剂标准品;标准品-对照品;标准品，对照品;标准品 -中药标准品 | |
| 5 | 20086-60-6 | 表诺多星 | Epinodosin | C20H26O6
| 二萜;对照品;中药对照品 | |
| 6 | 73522-63-1 | 化合物 T32646 | leptocarpin | C20H26O6
| | |
| 7 | 14237-91-3 | (-)-Ememodin | (-)-Ememodin | C20H26O6
| | |
| 8 | 108657-10-9 | 野马追内酯K | Eupalinolide K | C20H26O6
| 标准品;对照品;标准品，对照品;标准品 -中药标准品 | |
| 9 | | 泽兰苦素 | Eupatoriopicrin | C20H26O6
| | |
| 10 | 6856-01-5 | EUPATORIOPICRINE | eupatoriopicrine | C20H26O6
| 倍半萜 | |
| 11 | 6980-44-5 | gibberellin A(19) | gibberellin A(19) | C20H26O6
| | |
| 12 | 38456-39-2 | 去乙酰锯齿泽兰内酯 | Deacetyleupaserrin | C20H26O6
| 倍半萜 | |
| 13 | | 去酰半齿泽兰素 | Desacetyleupaserrin | C20H26O6
| | |
| 14 | 29388-59-8 | 开环异落叶松树脂酚 | Secoisolariciresinol | C20H26O6
| 对照品;标准品;木脂素;植物提取物;分析试剂-对照品;标准品 -中药标准品 | |
| 15 | 110382-37-1 | 3-O-Methyltagitinin F | 3-O-Methyltagitinin F | C20H26O6
| | |
| 16 | 17454-52-3 | 2,3-NAPHTHO-18-CROWN-6 | 2,3-NAPHTHO-18-CROWN-6 | C20H26O6
| | |
| 17 | 40336-80-9 | 霉酚酸异丙酯 | Isopropyl Mycophenolate | C20H26O6
| | |
| 18 | 145265-02-7 | (+)-开环异落叶松树脂酚 | (+)-Secoisolariciresinol | C20H26O6
| 标准品 | |
| 19 | 1346603-90-4 | rac Secoisolariciresinol-d6 | rac Secoisolariciresinol-d6 | C20H26O6
| | |
| 20 | | rac Secoisolariciresinol-13C3 | rac Secoisolariciresinol-13C3 | C20H26O6
| Aromatics;Intermediates & Fine Chemicals;Isotope Labelled Compounds;Pharmaceuticals | |
| 21 | | 2,3,3',4,4',5-Hexamethoxybibenzyl | 2,3,3',4,4',5-Hexamethoxybibenzyl | C20H26O6
| | |
| 22 | | 2,3',4,4',5,5'-Hexamethoxybibenzyl | 2,3',4,4',5,5'-Hexamethoxybibenzyl | C20H26O6
| | |
| 23 | 117397-31-6 | 对苯二甲酸二[4-(乙烯氧基)丁基]酯 | BIS[4-(VINYLOXY)BUTYL]TEREPHTHALATE | C20H26O6
| | |
| 24 | 16763-48-7 | Enmein, 13-deoxy-19-hydroxy-, (19R)- | Enmein, 13-deoxy-19-hydroxy-, (19R)- | C20H26O6
| | |
| 25 | 36199-02-7 | D-Mannitol, 3,4-bis-O-(phenylmethyl)- | D-Mannitol, 3,4-bis-O-(phenylmethyl)- | C20H26O6
| | |
| 26 | 130066-57-8 | 双[4-(乙烯氧基)丁基]异酞酸酯 | BIS(4-(VINYLOXY)BUTYL) ISOPHTHALATE 96 | C20H26O6
| | |
| 27 | 99782-78-2 | DL-1,4-BIS-O-(PHENYLMETHYL)-MYO INOSITOL | DL-1,4-BIS-O-(PHENYLMETHYL)-MYO INOSITOL | C20H26O6
| | |
| 28 | 33284-74-1 | 1,1'-(1,2-Ethanediyl)bis(3,4,5-trimethoxybenzene) | 1,1'-(1,2-Ethanediyl)bis(3,4,5-trimethoxybenzene) | C20H26O6
| | |
| 29 | 53505-68-3 | 4,9,9'-Trihydroxy-3,3'- dimethoxy-8,4'-oxyneolignan | 4,9,9'-Trihydroxy-3,3'- dimethoxy-8,4'-oxyneolignan | C20H26O6
| 木脂素 | |
| 30 | | Diethyl[3-(Cyclopentyloxy)-4-Methoxybenzylidene]Malonate | Diethyl[3-(Cyclopentyloxy)-4-Methoxybenzylidene]Malonate | C20H26O6
| | |
| 31 | | METHYL 2,3-O-DIALLYL-4,6-O-BENZYLIDENE-A-D-MANNOPYRANOSIDE | METHYL 2,3-O-DIALLYL-4,6-O-BENZYLIDENE-A-D-MANNOPYRANOSIDE | C20H26O6
| | |
| 32 | 455943-61-0 | 3,3',5,5'-四甲氧甲基联苯二酚 TMOMBP | 3,3',5,5'-Tetrakis(MethoxyMethyl)-[1,1'-biphenyl]-4,4'-diol | C20H26O6
| 化工原料 | |
| 33 | 359437-00-6 | Methyl 2,3-Di-O-allyl-4,6-O-benzylidene-α-D-mannopyranoside | Methyl 2,3-Di-O-allyl-4,6-O-benzylidene-α-D-mannopyranoside | C20H26O6
| | |
| 34 | 38991-79-6 | (15R)-11,12,14,16-Tetrahydroxy-8,11,13-abietatriene-6,7-dione | (15R)-11,12,14,16-Tetrahydroxy-8,11,13-abietatriene-6,7-dione | C20H26O6
| | |
| 35 | 62849-10-9 | α-[(2,4-Dimethoxyphenyl)methyl]-β,3,4-trimethoxybenzeneethanol | α-[(2,4-Dimethoxyphenyl)methyl]-β,3,4-trimethoxybenzeneethanol | C20H26O6
| | |
| 36 | | [R,(-)]-1-(3,4-Dimethoxyphenyl)-3-(2,4,6-trimethoxyphenyl)-2-propanol | [R,(-)]-1-(3,4-Dimethoxyphenyl)-3-(2,4,6-trimethoxyphenyl)-2-propanol | C20H26O6
| | |
| 37 | | 2'-(Isopropyloxy)-3'-(3-methyl-2-butenyl)-4',6'-diacetoxy-acetophenone | 2'-(Isopropyloxy)-3'-(3-methyl-2-butenyl)-4',6'-diacetoxy-acetophenone | C20H26O6
| | |
| 38 | 7382-18-5 | 1,3-Benzenedicarboxylic acid, 1,3-bis[(3-ethyl-3-oxetanyl)methyl] ester | 1,3-Benzenedicarboxylic acid, 1,3-bis[(3-ethyl-3-oxetanyl)methyl] ester | C20H26O6
| | |
| 39 | | 1-[2-(2,5-dimethoxy-4-methylphenoxy)ethoxy]-2,5-dimethoxy-4-methylbenzene | 1-[2-(2,5-dimethoxy-4-methylphenoxy)ethoxy]-2,5-dimethoxy-4-methylbenzene | C20H26O6
| | |
| 40 | 408324-13-0 | (3R,5R)-1-(4-Hydroxy-3-methoxyphenyl)-7-(3,4-dihydroxyphenyl)heptane-3,5-diol | (3R,5R)-1-(4-Hydroxy-3-methoxyphenyl)-7-(3,4-dihydroxyphenyl)heptane-3,5-diol | C20H26O6
| | |
| 41 | 26745-19-7 | Butanedioic acid, methylene-, polymer with butyl 2-propenoate and ethenylbenzene | Butanedioic acid, methylene-, polymer with butyl 2-propenoate and ethenylbenzene | C20H26O6
| | |
| 42 | 1185143-75-2 | 布地奈德杂质31 | Androsta-1,4-diene-17-carboxylic acid, 11,16,17-trihydroxy-3-oxo-, (11β,16α,17α)- | C20H26O6
| 159-布地奈德 | |
| 43 | 168074-94-0 | | 2H-1-Benzopyran-2-one, 7-[[(2E,6S)-6,7-dihydroxy-3,7-dimethyl-2-octen-1-yl]oxy]-8-methoxy- | C20H26O6
| | |
| 44 | 70610-01-4 | (+)-8-(2,3-Dihydroxy-3-methylbutyl)-7-methoxy-5-[(3-methyl-2-butenyl)oxy]-2H-1-benzopyran-2-one | (+)-8-(2,3-Dihydroxy-3-methylbutyl)-7-methoxy-5-[(3-methyl-2-butenyl)oxy]-2H-1-benzopyran-2-one | C20H26O6
| | |
| 45 | 36434-14-7 | 1α,4aα-(Carbonyloxymethylene)-2β,7-dihydroxy-1β-methyl-8-methylenegibbane-10β-carboxylic acid | 1α,4aα-(Carbonyloxymethylene)-2β,7-dihydroxy-1β-methyl-8-methylenegibbane-10β-carboxylic acid | C20H26O6
| | |
| 46 | 23365-01-7 | 1α,4aα-(Carbonyloxymethylene)-2β,3β-dihydroxy-1β-methyl-8-methylenegibbane-10β-carboxylic acid | 1α,4aα-(Carbonyloxymethylene)-2β,3β-dihydroxy-1β-methyl-8-methylenegibbane-10β-carboxylic acid | C20H26O6
| | |
| 47 | 1070228-90-8 | 6-Octenoic acid, 8-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-2,6-dimethyl-, (6E)- | 6-Octenoic acid, 8-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-2,6-dimethyl-, (6E)- | C20H26O6
| | |
| 48 | 51943-81-8 | 2-Methyl-2-butenoic acid dodecahydro-2b,5,7c-trimethyl-6-oxobisoxireno[5,6:7,8]naphtho[1,2-b]furan-5-yl ester | 2-Methyl-2-butenoic acid dodecahydro-2b,5,7c-trimethyl-6-oxobisoxireno[5,6:7,8]naphtho[1,2-b]furan-5-yl ester | C20H26O6
| | |
| 49 | 25644-08-0 | 2-Methyl-2-butenoic acid dodecahydro-7-hydroxy-4a,8-dimethyl-3-methylene-2,5-dioxoazuleno[6,5-b]furan-4-yl ester | 2-Methyl-2-butenoic acid dodecahydro-7-hydroxy-4a,8-dimethyl-3-methylene-2,5-dioxoazuleno[6,5-b]furan-4-yl ester | C20H26O6
| | |
| 50 | 94190-29-1 | 3-Hydroxy-2-methylenebutanoic acid dodecahydro-6-hydroxy-5a-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4-yl ester | 3-Hydroxy-2-methylenebutanoic acid dodecahydro-6-hydroxy-5a-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4-yl ester | C20H26O6
| | |
| 51 | 77573-31-0 | (3aR)-5-(Acetyloxy)methyl-3a,4,6aα,7,9,10,10a,10bβ-octahydro-10aβ-hydroxy-3aα-methoxy-2,10β-dimethylbenz[e]azulene-3,8-dione | (3aR)-5-(Acetyloxy)methyl-3a,4,6aα,7,9,10,10a,10bβ-octahydro-10aβ-hydroxy-3aα-methoxy-2,10β-dimethylbenz[e]azulene-3,8-dione | C20H26O6
| | |
| 52 | 60385-82-2 | (1R,4S)-4,4aβ,5,6,7,10-Hexahydro-1α,6β,9-trihydroxy-4-methyl-8-isopropyl-3H-4β,10bβ-propano-1H-naphtho[1,2-c]pyran-7,10-dione | (1R,4S)-4,4aβ,5,6,7,10-Hexahydro-1α,6β,9-trihydroxy-4-methyl-8-isopropyl-3H-4β,10bβ-propano-1H-naphtho[1,2-c]pyran-7,10-dione | C20H26O6
| | |
| 53 | 69883-96-1 | 2a,3,5,6,11a,11b-Hexahydro-3-hydroxy-2a,6,10-trimethyl-3-(1-methylpropyl)-6,9-epoxy-2H-1,4-dioxacyclodeca[cd]pentalene-2,7(4aH)-dione | 2a,3,5,6,11a,11b-Hexahydro-3-hydroxy-2a,6,10-trimethyl-3-(1-methylpropyl)-6,9-epoxy-2H-1,4-dioxacyclodeca[cd]pentalene-2,7(4aH)-dione | C20H26O6
| | |
| 54 | 52677-97-1 | 2,3-Dimethyl-2-oxiranecarboxylic acid 2,3,3a,4,5,8,9,11a-octahydro-9-hydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-yl ester | 2,3-Dimethyl-2-oxiranecarboxylic acid 2,3,3a,4,5,8,9,11a-octahydro-9-hydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-yl ester | C20H26O6
| | |
| 55 | 72948-01-7 | 2-Methylbutanoic acid [(3aR,4R,9S,11aR)-6-formyl-2,3,3a,4,5,8,9,11a-octahydro-9-hydroxy-10-methyl-3-methylene-2-oxocyclodeca[b]furan-4-yl] ester | 2-Methylbutanoic acid [(3aR,4R,9S,11aR)-6-formyl-2,3,3a,4,5,8,9,11a-octahydro-9-hydroxy-10-methyl-3-methylene-2-oxocyclodeca[b]furan-4-yl] ester | C20H26O6
| | |
| 56 | 62748-23-6 | (Z)-4-Hydroxy-2-(hydroxymethyl)-2-butenoic acid [(3R)-2,3,3aβ,4,5,7,9aβ,9bα-octahydro-3α,6,9-trimethyl-2-oxoazuleno[4,5-b]furan-4α-yl] ester | (Z)-4-Hydroxy-2-(hydroxymethyl)-2-butenoic acid [(3R)-2,3,3aβ,4,5,7,9aβ,9bα-octahydro-3α,6,9-trimethyl-2-oxoazuleno[4,5-b]furan-4α-yl] ester | C20H26O6
| | |
| 57 | 103974-71-6 | (5S,10aS)-7β-[(S)-2-(2,5-Dihydro-5-oxofuran-3-yl)-2-hydroxyethyl]-6,6aβ,7,8,9,10-hexahydro-5β-hydroxy-7,8α-dimethylnaphtho[1,8a-c]furan-3(5H)-one | (5S,10aS)-7β-[(S)-2-(2,5-Dihydro-5-oxofuran-3-yl)-2-hydroxyethyl]-6,6aβ,7,8,9,10-hexahydro-5β-hydroxy-7,8α-dimethylnaphtho[1,8a-c]furan-3(5H)-one | C20H26O6
| | |
| 58 | | (3aR,4R,6E,8S,10E,11aR)-3a,4,5,8,9,11a-Hexahydro-4-(2,3-dimethyloxiran-2-ylcarbonyloxy)-6,10-dimethyl-3-methylene-8-hydroxycyclodeca[b]furan-2(3H)-one | (3aR,4R,6E,8S,10E,11aR)-3a,4,5,8,9,11a-Hexahydro-4-(2,3-dimethyloxiran-2-ylcarbonyloxy)-6,10-dimethyl-3-methylene-8-hydroxycyclodeca[b]furan-2(3H)-one | C20H26O6
| | |
| 59 | 6995-10-4 | (Z)-2-Methyl-2-butenoic acid [(3S)-2,3,3aα,4,4a,5,7aα,8,9,9aα-decahydro-9β-hydroxy-3β,4aβ,8α-trimethyl-2,5-dioxoazuleno[6,5-b]furan-4α-yl] ester | (Z)-2-Methyl-2-butenoic acid [(3S)-2,3,3aα,4,4a,5,7aα,8,9,9aα-decahydro-9β-hydroxy-3β,4aβ,8α-trimethyl-2,5-dioxoazuleno[6,5-b]furan-4α-yl] ester | C20H26O6
| | |
| 60 | 52691-15-3 | (3S)-3a,5aα,7,8,9,10,10aβ,10cα-Octahydro-3-hydroxy-8β-hydroxyacetyl-3aα,8-dimethyl-4H-3,10bβ-ethano-1H,3H-benzo[h]furo[4,3,2-de]-2-benzopyran-4-one | (3S)-3a,5aα,7,8,9,10,10aβ,10cα-Octahydro-3-hydroxy-8β-hydroxyacetyl-3aα,8-dimethyl-4H-3,10bβ-ethano-1H,3H-benzo[h]furo[4,3,2-de]-2-benzopyran-4-one | C20H26O6
| | |
| 61 | 94190-30-4 | (E)-2-Methyl-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9bα-decahydro-6α,8β-dihydroxy-5aα,9-dimethyl-3-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | (E)-2-Methyl-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9bα-decahydro-6α,8β-dihydroxy-5aα,9-dimethyl-3-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | C20H26O6
| | |
| 62 | 72065-36-2 | (Z)-2-Methyl-2-butenoic acid [(3aS,4R,5R,6E,8R,10E,11aR)-2,3,3a,4,5,8,9,11a-octahydro-5,8-dihydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-yl] ester | (Z)-2-Methyl-2-butenoic acid [(3aS,4R,5R,6E,8R,10E,11aR)-2,3,3a,4,5,8,9,11a-octahydro-5,8-dihydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-yl] ester | C20H26O6
| | |
| 63 | 92356-86-0 | (Z)-2-(Hydroxymethyl)-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,9aβ,9bα-decahydro-6α-hydroxy-5aα,9-dimethyl-3-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | (Z)-2-(Hydroxymethyl)-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,9aβ,9bα-decahydro-6α-hydroxy-5aα,9-dimethyl-3-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | C20H26O6
| | |
| 64 | 92484-28-1 | (E)-2-Methyl-2-butenoic acid (4R)-2,4,5,5a,6,7,8,9,9aβ,9bα-decahydro-6α-hydroxy-3-(hydroxymethyl)-5aα-methyl-9-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | (E)-2-Methyl-2-butenoic acid (4R)-2,4,5,5a,6,7,8,9,9aβ,9bα-decahydro-6α-hydroxy-3-(hydroxymethyl)-5aα-methyl-9-methylene-2-oxonaphtho[1,2-b]furan-4α-yl ester | C20H26O6
| | |
| 65 | 103974-70-5 | (E)-4-Hydroxy-2-methyl-2-butenoic acid [(3aR)-2,3,3aβ,4,5,6,6aβ,7,9aβ,9bα-decahydro-6α-hydroxymethyl-9-methyl-3-methylene-2-oxoazuleno[4,5-b]furan-4α-yl] ester | (E)-4-Hydroxy-2-methyl-2-butenoic acid [(3aR)-2,3,3aβ,4,5,6,6aβ,7,9aβ,9bα-decahydro-6α-hydroxymethyl-9-methyl-3-methylene-2-oxoazuleno[4,5-b]furan-4α-yl] ester | C20H26O6
| | |
| 66 | 94190-31-5 | (E)-2-Methyl-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9,9aβ,9bα-dodecahydro-6α,8β-dihydroxy-5aα-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4α-yl ester | (E)-2-Methyl-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9,9aβ,9bα-dodecahydro-6α,8β-dihydroxy-5aα-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4α-yl ester | C20H26O6
| | |
| 67 | 94190-28-0 | (E)-2-(Hydroxymethyl)-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9,9aβ,9bα-dodecahydro-6α-hydroxy-5aα-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4α-yl ester | (E)-2-(Hydroxymethyl)-2-butenoic acid (3aR)-2,3,3aβ,4,5,5a,6,7,8,9,9aβ,9bα-dodecahydro-6α-hydroxy-5aα-methyl-3,9-bis(methylene)-2-oxonaphtho[1,2-b]furan-4α-yl ester | C20H26O6
| | |
| 68 | 84886-38-4 | 2-Butenoic acid, 2-methyl-, 2,3,3a,4,5,8,9,11a-octahydro-5,9-dihydroxy -6,10-dimethyl-3-methylene-2-oxocyclodeca(b)furan-4-yl ester, (3aS-(3a R*,4S*(Z),5S*,6E,9S*,10Z,11aS*))- | 2-Butenoic acid, 2-methyl-, 2,3,3a,4,5,8,9,11a-octahydro-5,9-dihydroxy -6,10-dimethyl-3-methylene-2-oxocyclodeca(b)furan-4-yl ester, (3aS-(3a R*,4S*(Z),5S*,6E,9S*,10Z,11aS*))- | C20H26O6
| | |
| 69 | 57718-81-7 | (E)-4-Hydroxy-2-methyl-2-butenoic acid (1aR,4E,7R,7aR,10aS,10bR)-1a,2,3,6,7,7a,8,9,10a,10b-decahydro-1a,5-dimethyl-8-methylene-9-oxooxireno[9,10]cyclodeca[1,2-b]furan-7-yl ester | (E)-4-Hydroxy-2-methyl-2-butenoic acid (1aR,4E,7R,7aR,10aS,10bR)-1a,2,3,6,7,7a,8,9,10a,10b-decahydro-1a,5-dimethyl-8-methylene-9-oxooxireno[9,10]cyclodeca[1,2-b]furan-7-yl ester | C20H26O6
| | |
| 70 | 61264-10-6 | 3-Methyl-2-butenoic acid [(1aR,4E,6R,7R,7aR,10aS,10bR)-1a,2,3,6,7,7a,8,9,10a,10b-decahydro-6-hydroxy-1a,5-dimethyl-8-methylene-9-oxooxireno[9,10]cyclodeca[1,2-b]furan-7-yl] ester | 3-Methyl-2-butenoic acid [(1aR,4E,6R,7R,7aR,10aS,10bR)-1a,2,3,6,7,7a,8,9,10a,10b-decahydro-6-hydroxy-1a,5-dimethyl-8-methylene-9-oxooxireno[9,10]cyclodeca[1,2-b]furan-7-yl] ester | C20H26O6
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| 71 | 66548-00-3 | (3S,3aR,4R,4'aβ,7'α,7aR,9'aα)-3,3a,5,5',6,6',7,7',7a,8'-Decahydro-3,5'α-dihydroxy-7a-methyl-8'-methylenespiro[isobenzofuran-4(1H),4'(3'H)-[1H-7,9a]methanocyclohepta[c]pyran]-1',9'(4'aH)-dione | (3S,3aR,4R,4'aβ,7'α,7aR,9'aα)-3,3a,5,5',6,6',7,7',7a,8'-Decahydro-3,5'α-dihydroxy-7a-methyl-8'-methylenespiro[isobenzofuran-4(1H),4'(3'H)-[1H-7,9a]methanocyclohepta[c]pyran]-1',9'(4'aH)-dione | C20H26O6
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