[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][Branch1][C][C][O][C][=C][C][Branch1][C][Cl][=C][C][=C][Ring1][#Branch1][N+1][=Branch1][C][=O][O-1]>>[C][C][Branch1][C][C][O][C][=C][C][Branch1][C][Cl][=C][C][=C][Ring1][#Branch1][N]"}, {"from": "gpt", "value": "[C][O].[N][N].[O].[Ni]"}]