[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [Br][Br].[C][O][C][=C][C][=C][C][=N][Ring1][=Branch1]>>[C][O][C][=C][C][=C][Branch1][C][Br][C][=N][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][C][O][C][C].[Na+1].[OH1-1]"}]