(8S,9R,11S,13R,14S,17R)-17-Acetyl-13-allyl-3-methoxy-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-11-carboxylic acid methyl ester 在
臭氧 、
二甲基硫 作用下,
以
甲醇 为溶剂,
以77%的产率得到(8S,9R,11S,13S,14S,17R)-17-Acetyl-3-methoxy-13-(2-oxo-ethyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-11-carboxylic acid methyl ester