[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][I].[O][C][=C][C][=C][C][=C][C][=N][C][Ring1][=Branch1][=C][Ring1][#Branch2][Br]>>[C][O][C][=C][C][=C][C][=C][C][=N][C][Ring1][=Branch1][=C][Ring1][#Branch2][Br]"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][=O].[O][=C][Branch1][C][O-1][O-1].[K+1].[K+1]"}]