Pentylamino-acetic acid (3R,5S,8S,9S,10S,11S,13S,14S,17S)-17-acetyl-3-hydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-11-yl ester 、
碘甲烷 在
potassium carbonate 作用下,
以
乙醇 为溶剂,
生成 (Methyl-pentyl-amino)-acetic acid (3R,5S,8S,9S,10S,11S,13S,14S,17S)-17-acetyl-3-hydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-11-yl ester