[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][N][C][C].[F][C][=C][C][Branch1][C][I][=C][C][=C][Ring1][#Branch1][C][Br]>>[C][C][N][Branch1][Ring1][C][C][C][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1][F]"}, {"from": "gpt", "value": "[C][C][O]"}]