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