英文名称
4-[[(1R,3aR,5aS,5bS,7aR,9S,11aR,11bS,13aS,13bS)-3a-[(4-hydroxy-2,2-dimethyl-4-oxo-butanoyl)oxymethyl]-1-isopropenyl-8,8,11a-trimethyl-1,2,3,4,5,5a,5b,6,7,7a,9,10,11,11b,12,13,13a,13b-octadecahydrocyclopenta[a]chrysen-9-yl]oxy]-2,2-dimethyl-4-oxo-butanoic acid