乙酸酐 、
(1R,3S,5S,8S,9S,10S,13S,14S,17S)-10,13,17-Trimethyl-hexadecahydro-cyclopenta[a]phenanthrene-1,3,5,17-tetraol 在
吡啶 作用下,
生成 Acetic acid (1R,3S,5S,8S,9S,10S,13S,14S,17S)-3,17-diacetoxy-5-hydroxy-10,13,17-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-1-yl ester