Acetic acid (4R,4aS,6aS,6bS,8aR,10R,11R,12aR,12bS,14aS,14bS)-10-acetoxy-11-hydroxy-3,3,6a,6b,9,9,12a,14b-octamethyl-docosahydro-picen-4-yl ester 在
chromium(VI) oxide 、
硫酸 、
氨 、
calcium 作用下,
生成
Acetic acid (4R,4aS,6aS,6bS,8aS,12aS,12bS,14aS,14bS)-3,3,6a,6b,9,9,12a,14b-octamethyl-11-oxo-docosahydro-picen-4-yl ester