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