(3S,8S,9S,10R,13S,14S,17S)-17-[(1S)-1-aminoethyl]-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol 、
乙二醇 、 alkaline earth salt of/the/ methylsulfuric acid 以
苯 为溶剂,
以80%的产率得到(3R,8S,9S,10R,13S,14S,17S)-17-(1-[1,5,3]Dioxazepan-3-yl-ethyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol