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