[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][C][=C][C][Branch1][Ring1][C][#N][=C][C][=C][Ring1][Branch2][N+1][=Branch1][C][=O][O-1]>>[C][C][=C][C][Branch1][Ring1][C][#N][=C][C][=C][Ring1][Branch2][N]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[Cl].[Cl][Sn][Cl].[NH4+1].[OH1-1]"}]