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