Acetic acid (3S,10R,13S,17S)-17-[(R)-1-hydroxy-1-((R)-3-isopropyl-4,5-dihydro-isoxazol-5-yl)-ethyl]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
lithium perchlorate 、
三氟乙酸 作用下,
以
硝基甲烷 为溶剂,
以78%的产率得到Acetic acid (3S,10R,13S,17R)-17-[(R)-1-(3-isopropyl-isoxazol-5-yl)-ethyl]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester