乙酸酐 、
(E)-4-Hydroxy-2-hydroxymethyl-but-2-enoic acid (E)-2-((3aR,4R,9aS,9bR)-6,9-dimethyl-3-methylene-2-oxo-2,3,3a,4,5,7,9a,9b-octahydro-azuleno[4,5-b]furan-4-yloxycarbonyl)-4-hydroxy-but-2-enyl ester 反应 1.0h,
生成 (E)-4-Acetoxy-2-((E)-4-acetoxy-2-acetoxymethyl-but-2-enoyloxymethyl)-but-2-enoic acid (3aR,4R,9aS,9bR)-6,9-dimethyl-3-methylene-2-oxo-2,3,3a,4,5,7,9a,9b-octahydro-azuleno[4,5-b]furan-4-yl ester