[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [C][C][=C][C][=C][Branch1][C][Br][C][Branch1][C][Cl][=C][Ring1][Branch2].[N][#C][Cu]>>[C][C][=C][C][=C][Branch1][Ring1][C][#N][C][Branch1][C][Cl][=C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][O][C][Branch1][C][C][=O].[C][N][Branch1][C][C][C][=O]"}]