Acetic acid (3S,5S,10S,13S,14R)-10,13-dimethyl-11-oxo-2,3,4,5,6,7,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
lead(IV) acetate 作用下,
生成
Acetic acid (6aS,8S,10aS,13aS)-10a,13a-dimethyl-4,11,12-trioxo-hexadecahydro-benzo[a]cyclopenta[f]cyclodecen-8-yl ester