[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][O][C][=C][C][=C][Branch1][C][Br][C][Branch1][Ring1][C][Br][=C][Ring1][=Branch2].[C-1][#N]>>[C][O][C][=C][C][=C][Branch1][C][Br][C][Branch1][Ring2][C][C][#N][=C][Ring1][#Branch2]"}, {"from": "gpt", "value": "[C][C][O].[O].[Br-1].[Na+1]"}]