[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [O][C][C][N][C][C][Ring1][Branch1][C][C][Ring1][Ring1].[O][C][C][C][Br]>>[O][C][C][C][N][C][C][Branch1][C][O][C][Branch1][Branch1][C][C][Ring1][Ring1][C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1]"}]