[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [O][=C][C][C][C][=C][C][Branch1][C][Br][=C][N][=C][Ring1][#Branch1][N][Ring1][O]>>[Br][C][=C][N][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C][N][Ring1][#Branch1]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[BH4-1].[Na+1]"}]