Acetic acid (3aS,5aS,5bR,9aR,10S,10aR,10bS)-9a-hydroxy-3a,5b-dimethyl-3,8-dioxo-hexadecahydro-cyclopenta[a]fluoren-10-ylmethyl ester 在
吡啶 、
氯化亚砜 作用下,
生成 Acetic acid (3aS,5aS,5bR,10R,10aR,10bS)-3a,5b-dimethyl-3,8-dioxo-1,2,3,3a,4,5,5a,5b,6,7,8,10,10a,10b-tetradecahydro-cyclopenta[a]fluoren-10-ylmethyl ester