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