[(3R,5S,8R,9S,10S,13S,14S)-16-bromo-10,13-dimethyl-17-oxo-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-3-yl] acetate 、
氨基硫脲 以
异丙醇 为溶剂,
以30%的产率得到[(1R,2S,10S,13S,14S,17R,19S)-6-amino-10,14-dimethyl-5-thia-7,8-diazapentacyclo[11.8.0.02,10.04,9.014,19]henicosa-4(9),6-dien-17-yl] acetate