[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [F][C][C][Br].[O][C][=C][C][=C][N][=C][Ring1][=Branch1][Br]>>[F][C][C][O][C][=C][C][=C][N][=C][Ring1][=Branch1][Br]"}, {"from": "gpt", "value": "[C][C][#N].[O][=C][Branch1][C][O-1][O-1].[K+1].[K+1]"}]