Acetic acid (2R,3S,8S,9S,10R,13S,14S,17R)-3-acetoxy-17-[(S)-1-((4R,5S)-5-isobutyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethyl]-10,13-dimethyl-6-oxo-hexadecahydro-cyclopenta[a]phenanthren-2-yl ester 在
disodium hydrogenphosphate 、
三氟过氧乙酸 作用下,
以
二氯甲烷 为溶剂,
生成 Acetic acid (1R,3aS,3bS,6aS,8S,9R,10aR,10bS,12aS)-8-acetoxy-1-[(S)-1-((4R,5S)-5-isobutyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethyl]-10a,12a-dimethyl-6-oxo-hexadecahydro-5-oxa-benzo[3,4]cyclohepta[1,2-e]inden-9-yl ester