alkaline earth salt of/the/ methylsulfuric acid 在
ammonium cerium(IV) nitrate 作用下,
以
丙酮 为溶剂,
以56%的产率得到Acetic acid (3S,8R,9S,10R,13S,14S,17S)-17-ethynyl-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester