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