Using C[O-], CC(=O)OCC1OC(Oc2ccsc2C(=O)NCc2ccccc2)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O to produce O=C(O)c1sccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.