Hydrochloric Acid → 2-(4-aminophenyl)-9-chloro-4,4a,5,6-tetrahydrobenzo[h]cinnolin-3(2H)-one

Reaction equation

[CH3:27][CH2:28][OH:29].[Cl:1][c:2]1[cH:3][c:4]2[c:5]([cH:24][cH:25]1)[CH2:6][CH2:7][CH:8]1[CH2:9][C:10](=[O:23])[N:11]([c:14]3[cH:15][cH:16][c:17]([N+:20]([O-:21])=[O:22])[cH:18][cH:19]3)[N:12]=[C:13]21.[ClH:26].[Fe:31].[OH2:30]>>[Cl:1][c:2]1[cH:3][c:4]2[c:5]([cH:24][cH:25]1)[CH2:6][CH2:7][CH:8]1[CH2:9][C:10](=[O:23])[N:11]([c:14]3[cH:15][cH:16][c:17]([NH2:20])[cH:18][cH:19]3)[N:12]=[C:13]21