[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [O][=C][Branch1][C][O][C][=C][C][=C][N][=C][Ring1][=Branch1][Cl]>>[O][C][C][=C][C][=C][N][=C][Ring1][=Branch1][Cl]"}, {"from": "gpt", "value": "[O].[O][=S][Branch1][C][Cl][Cl].[BH4-1].[Cl-1].[Na+1].[Na+1]"}]