[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [O][=C][Branch1][C][Cl][C][C][Br].[O][=C][N][C][C][N][C][C][Ring1][=Branch1]>>[O][=C][N][C][C][N][Branch1][Branch2][C][=Branch1][C][=O][C][C][Br][C][C][Ring1][O]"}, {"from": "gpt", "value": "[Cl][C][Cl].[O].[O][=C][Branch1][C][O-1][O].[Na+1]"}]