[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][C][O][C][=Branch1][C][=O][C][C][C][Br].[N][#C][C][=C][C][=C][C][NH1][C][=C][C][Ring1][=Branch2][=Ring1][Branch1]>>[C][C][O][C][=Branch1][C][=O][C][C][C][N][C][=C][C][=C][Branch1][Ring1][C][#N][C][=C][C][=C][Ring1][Branch2][Ring1][O]"}, {"from": "gpt", "value": "[C][C][O][C][C].[O][=C][Branch1][C][O-1][O-1].[Cs+1].[Cs+1]"}]