[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [O][=C][N][C][C][C][C][=C][C][Branch1][C][I][=C][C][=C][Ring1][#Branch1][Ring1][N]>>[I][C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C][N][C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[C][O].[Cl].[O]"}]