[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [Br][C][=C][N][=C][Branch1][C][Br][S][Ring1][=Branch1].[C][N][C][C][N]>>[C][N][Branch1][Ring2][C][C][N][C][=N][C][=C][Branch1][C][Br][S][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][O].[C][C][O].[Cl][C][C][Cl].[Cl][Cu].[Cu]"}]