23-demethylacanthasterol acetate 、 alkaline earth salt of/the/ methylsulfuric acid 反应 1.0h,
生成 ((3S,5S,9R,10S,13R,14R,17R)-17-{(R)-1-[(1R,2R)-2-((R)-1,2-Dimethyl-propyl)-cyclopropyl]-ethyl}-10,13-dimethyl-2,3,4,5,6,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yloxy)-trimethyl-silane