Acetic acid (3S,5S,10S,13S,14R,17S)-17-((R)-1-acetoxy-ethyl)-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
吡啶 、
四氧化锇 作用下,
生成
Acetic acid (3S,5S,8S,9S,10S,13R,14R,17S)-17-((R)-1-acetoxy-ethyl)-8,9-dihydroxy-10,13-dimethyl-11-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester