[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [C][=C][C][C][Branch1][C][O][C][C][=C].[C][I]>>[C][=C][C][C][Branch1][Ring2][C][C][=C][O][C]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[H-1].[Na+1]"}]