3-(4-Benzyloxyphenyl)-5-hydroxymethylpyrrolo[2,1,5-cd]indolizine-1,2-dicarboxylic acid 、
乙酸酐 以to afford 5-acetoxymethyl-3-(4-benzyloxyphenyl)pyrrolo[2,1,5-cd]indolizine-1,2-dicarboxylic acid anhydride as red crystals in 86%的产率得到5-acetoxymethyl-3-(4-benzyloxyphenyl)pyrrolo[2,1,5-cd]indolizine-1,2-dicarboxylic acid anhydride