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