[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [Br][C][C][C][Br].[O][C][=C][C][=C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][N]>>[Br][C][C][C][O][C][=C][C][=C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][N]"}, {"from": "gpt", "value": "[C][C][#N].[O][=C][Branch1][C][O-1][O-1].[Cs+1].[Cs+1]"}]