乙酸酐 、
(1aS,1bR,3R,3aR,5S,7bR,9aR)-5-((R)-1-Bromo-2-hydroxy-ethyl)-1a,5,7b-trimethyl-1a,1b,2,3,3a,4,5,6,7b,8,9,9a-dodecahydro-1H-cyclopropa[a]phenanthren-3-ol 在
吡啶 作用下,
生成 Acetic acid (1aS,1bR,3R,3aR,5S,7bR,9aR)-5-((R)-2-acetoxy-1-bromo-ethyl)-1a,5,7b-trimethyl-1a,1b,2,3,3a,4,5,6,7b,8,9,9a-dodecahydro-1H-cyclopropa[a]phenanthren-3-yl ester