(1S,2R,4aR,6aR,6bR,8aR,10S,12aR,12bR,14aR,14bS)-1,2,6a,6b,9,9,12a-heptamethyl-3-oxoicosahydro-2H-2,4a-(epoxymethano)picen-10-yl acetate 以
吡啶 为溶剂,
生成
(1S,2R,4aS,6aR,6bR,8aR,10S,12aR,12bR,14aR,14bS)-10-Acetoxy-4a-cyano-1,2,6a,6b,9,9,12a-heptamethyl-icosahydro-3-oxa-picene-2-carboxylic acid