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