[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [Br][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1].[C-1][#N]>>[N][#C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][O][C][C][O][C][C][O][C][C][O][C][C][O][C][C][O][Ring2][Ring1][C].[C][C][#N].[O].[K+1]"}]