[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [Br][Br].[C][C][=C][C][Branch1][C][C][=N][C][Branch1][C][N][=C][Ring1][Branch2]>>[C][C][=C][C][Branch1][C][N][=N][C][Branch1][C][C][=C][Ring1][Branch2][Br]"}, {"from": "gpt", "value": "[O].[O][=S][=Branch1][C][=O][Branch1][C][O][O].[Na+1].[OH1-1]"}]