[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][=C][C][Br].[O][=C][C][=C][C][=C][C][Branch1][C][O][=C][Ring1][#Branch1]>>[C][=C][C][O][C][=C][C][=C][C][Branch1][Ring1][C][=O][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][Branch1][C][C][C].[C][C][O][C][C].[O][=C][Branch1][C][O-1][O-1].[Cs+1].[Cs+1]"}]