Acetic acid (1R,2S)-2-((3S,8S,9S,10R,13S,14S,17R)-3-acetoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-1-[1,3]dithian-2-yl-propyl ester 在
boron trifluoride etherate - mercuric oxide 作用下,
以
四氢呋喃 、
水 为溶剂,
生成
Acetic acid (1R,2S)-2-((3S,8S,9S,10R,13S,14S,17R)-3-acetoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-1-formyl-propyl ester