[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][O][C][=Branch1][C][=O][C][C][C][=C][N][C][=C][C][=C][C][Ring1][=Branch1][=N][Ring1][=Branch2]>>[O][C][C][C][C][=C][N][C][=C][C][=C][C][Ring1][=Branch1][=N][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[C][C][O].[Cl].[BH4-1].[Ca+2].[Cl-1].[Cl-1].[Na+1]"}]