[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][O][C][=C][Branch1][N][N][C][C][N][Branch1][C][C][C][C][Ring1][#Branch1][C][=C][C][=C][Ring1][=N][N+1][=Branch1][C][=O][O-1]>>[C][O][C][=C][Branch1][C][N][C][=C][C][=C][Ring1][#Branch1][N][C][C][N][Branch1][C][C][C][C][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][C][O].[N][N].[O].[Ni]"}]