(5R,8S,11R,13S,14S,17R)-11-[4-(5,5-dimethyl-1,3-dioxan-2-yl)phenyl]-17-ethynyl-5',5',13-trimethylspiro[1,2,4,5,6,7,8,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxane]-6,17-diol 生成
17α-ethinyl-11β-(4-formylphenyl)-17βhydroxy-4,9-estradien-3-one