trimethyl-2,5,7 oxo-6 cyclohepta (c) pyrrole 、
丁炔二酸二乙酯 以
氘代氯仿 为溶剂,
生成 (1R,9S)-4,6,12-Trimethyl-5-oxo-12-aza-tricyclo[7.2.1.0
2,8]dodeca-2(8),3,6,10-tetraene-10,11-dicarboxylic acid diethyl ester 、
tetraethoxycarbonyl-2,3,3a,4 trimethyl-1,7,9 dihydro-3a,10b oxo-8 (1H) cyclohepta (g) indole