[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [O][=N+1][Branch1][C][O-1][C][=C][C][N][=C][Branch1][C][Cl][NH1][C][=Ring1][=Branch1][C][=C][Ring1][#Branch2][I]>>[N][C][=C][C][N][=C][Branch1][C][Cl][NH1][C][=Ring1][=Branch1][C][=C][Ring1][#Branch2][I]"}, {"from": "gpt", "value": "[C][C][O].[Ni]"}]