9H-indeno-9-one-[1,2-b]:1,4-diaza-11H-fluoreno[2,3-g]quinoxalin-11-one   、                                                                                      
dimethyl (1S,12R,13S,14R,16S,17R)-3,10-dimethoxy-15-oxahexacyclo[10.5.1.02,11.04,9.013,17.014,16]octadeca-2,4,6,8,10-pentaene-14,16-dicarboxylate                                                                                                                                                                                              以
                                                                                         
邻二氯苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以16%的产率得到spiro[dimethyl-3,10-dimethoxy-1α,12α,13β,14α,17α,18β-16,19-dioxahexacyclo[10,6,1.1
14,170
2,110
4,90
13,18]-dodeca-2,4,6,8,10-pentaene-14,17-dicarboxylate-15,11'-9'H-indeno-9'-one-[1',2'-b]:1',4'-diaza-11'H-fluoreno[2',3'-g]quinoxalin]