[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][=C][C][Br].[C][C][=Branch1][C][=O][N][C][C][C][Branch1][C][O][C][C][Ring1][#Branch1]>>[C][=C][C][O][C][C][C][N][Branch1][=Branch1][C][Branch1][C][C][=O][C][C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][O].[C][C][O][C][C].[C][N][Branch1][C][C][C][=O].[H-1].[Na+1]"}]