[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [Cl][C][C][=C][C][=C][C][=C][C][Ring1][=Branch1][=C][C][=C][C][=C][C][=C][Ring1][=C][Ring1][=Branch1].[C-1][#N]>>[N][#C][C][C][=C][C][=C][C][=C][C][Ring1][=Branch1][=C][C][=C][C][=C][C][=C][Ring1][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][#N].[K+1]"}]