[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][O][C][=C][C][=C][Branch1][Ring1][C][#N][C][=C][Ring1][Branch2][F]>>[N][#C][C][=C][C][=C][Branch1][C][O][C][Branch1][C][F][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]