[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][O][C][C][C][C][Branch1][C][O][C][C][Ring1][#Branch1]>>[C][O][C][C][C][C][=Branch1][C][=O][C][C][Ring1][#Branch1]"}, {"from": "gpt", "value": "[Cl][C][Cl].[O][=Cr][=Branch1][C][=O][Branch1][C][O-1][Cl].[C][=C][C][=NH1+1][C][=C][Ring1][=Branch1]"}]