Using CNC(=S)N[C@H]1[C@H](OC(C)=O)O[C@H](COC(C)=O)[C@@H](OC(C)=O)[C@@H]1OC(C)=O to produce CNC1=NC2C(O[C@H](COC(C)=O)[C@@H](OC(C)=O)[C@@H]2OC(C)=O)S1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.