(5R,8R,9S,10S,13S,14S)-16-bromo-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-one 、
氨基硫脲 以
异丙醇 为溶剂,
以50%的产率得到(1R,2S,10S,13S,14S,19R)-10,14-dimethyl-5-thia-7,8-diazapentacyclo[11.8.0.02,10.04,9.014,19]henicosa-4(9),6-dien-6-amine