8,9-dimethoxy-2-methyl-5,6-dihydropyrrolo[2,1-a]isoquinoline 、
7-chloro-4,6-dinitrobenzofuroxane 反应 1.0h,
以81%的产率得到(9',10'-dimethoxy-2'-methyl-5-nitro-3'-oxo-6',7'-dihydro-3'H,7H-spiro[benzo[c][1,2,5]oxadiazole-4,4'-pyrido[2,1-a]isoquinolin]-7-ylidene-5'-ium)azinate