乙酸酐 、
Acetic acid (3S,5S,8S,9R,10S,11S,13S,14S,17S)-11-hydroxycarbamoyl-17-((R)-1-hydroxy-ethyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 以
吡啶 为溶剂,
生成 Acetic acid (3S,5S,8S,9R,10S,11S,13S,14S,17S)-11-acetoxycarbamoyl-17-((R)-1-acetoxy-ethyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester