Using COS(=O)(=O)OC, Sc1ncc2c(n1)-c1ccc(Cl)cc1C(c1ccccc1Cl)=NC2 to produce CSc1ncc2c(n1)-c1ccc(Cl)cc1C(c1ccccc1Cl)=NC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.