[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [C][O][C][C@H1][C][C][C@H1][Branch1][C][N][C][C][Ring1][#Branch1].[O][=C][C][C][C][C][C][Ring1][=Branch1]>>[C][O][C][C@H1][C][C][C@H1][Branch1][#Branch2][N][C][C][C][C][C][C][Ring1][=Branch1][C][C][Ring1][=N]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[C][O].[Cl].[BH3-1][C][#N].[Na+1]"}]