3β-Acetoxy-8,14α-epoxy-5β-aetiansaeure-methylester 在
silica gel 作用下,
以
苯 为溶剂,
生成 (3S,5R,8R,9R,10S,13R,17S)-3-Acetoxy-8-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-17-carboxylic acid methyl ester