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