[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [C][O][C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C][C][Ring1][#Branch1][Branch1][C][C][C]>>[C][C][Branch1][C][C][C][C][C][C][=C][C][Branch1][C][O][=C][C][=C][Ring1][#Branch1][Ring1][N]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl]"}]