[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][C][=C][C][Branch1][Ring1][C][O][=C][N][=C][Ring1][Branch2][C][#N]>>[C][C][=C][C][Branch1][Ring1][C][=O][=C][N][=C][Ring1][Branch2][C][#N]"}, {"from": "gpt", "value": "[Cl][C][Cl].[O][=Mn][=O]"}]