[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][O][C][=C][C][Branch1][C][N][=C][C][=C][Ring1][#Branch1][C][C][C][Ring1][Ring1]>>[N][C][=C][C][=C][Branch1][=Branch1][C][C][C][Ring1][Ring1][C][Branch1][C][O][=C][Ring1][#Branch2]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]