Acetic acid (S)-2-((3S,5S,6R,8S,9S,10R,13S,14S,16R,17S)-3,5-dihydroxy-6,10,13,16-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-2-hydroxy-ethyl ester 在
chromium(VI) oxide 、
硫酸 作用下,
以
丙酮 为溶剂,
生成
Acetic acid 2-((5S,6R,8S,9S,10R,13S,14S,16R,17S)-5-hydroxy-6,10,13,16-tetramethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-2-oxo-ethyl ester