[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [Br][C][=C][C][=C][C][Branch1][=Branch2][N][C][C][N][C][C][Ring1][=Branch1][=C][Ring1][N].[C][=O]>>[C][N][C][C][N][Branch1][N][C][=C][C][=C][C][Branch1][C][Br][=C][Ring1][#Branch1][C][C][Ring1][=N]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][O].[C][O].[O].[BH3-1][C][#N].[Cl-1].[NH4+1].[Na+1]"}]