油菜素甾酮

(2R,3S,5S,8S,9S,10R,13S,14S,17R)-17-((2S,3R,4R,5R)-3,4-dihydroxy-6-methyl-5-phenylheptan-2-yl)-2,3-dihydroxy-10,13-dimethylhexadecahydro-6H-cyclopenta[a]phenanthren-6-one