2-(2-Acetoxymethylvinyl)indole 、
N-triphenylmethylmaleimide 、
2,3-二氯-5,6-二氰基-1,4-苯醌 以to give 18.28 g (56%) of 4-acetoxymethyl-1,3-dioxo-1,2,3,6-tetrahydro-2-triphenylmethylpyrrolo[3,4-c]carbazole的产率得到4-acetoxymethyl-1,3-dioxo-1,2,3,6-tetrahydro-2-triphenylmethylpyrrolo[3,4-c]carbazole