[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [O][=C][C][=C][N][=C][C][Branch1][C][Br][=C][Ring1][#Branch1]>>[O][C][C][=C][N][=C][C][Branch1][C][Br][=C][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][C][O].[BH4-1].[Cl-1].[NH4+1].[Na+1]"}]