[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [O][=N+1][Branch1][C][O-1][C][C][=N][NH1][C][=Ring1][Branch1].[O][C][C][C][Br]>>[O][=N+1][Branch1][C][O-1][C][C][=N][N][Branch1][Branch1][C][C][C][O][C][=Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][#N].[O][=C][Branch1][C][O-1][O-1].[K+1].[K+1]"}]