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