1',5'-dibromo-1-(methoxymethyl)-4,6',9-trioxospiro[7,8-dihydro-6H-pyrrolo[3,2-g]quinoline-5,3'-cyclohexa-1,4-diene]-3-carbaldehyde 在
sodium tetrahydroborate 、 ammonium acetate 作用下,
生成 2',6'-dibromo-1-(methoxymethyl)-3-(2-nitroethyl)spiro[7,8-dihydro-6H-pyrrolo[3,2-g]quinoline-5,4'-cyclohexa-2,5-diene]-1',4,9-trione