Using Cc1ccc(S)cc1, O=C(O)CCc1oc(Cl)nc1-c1ccc(Cl)cc1 to produce Cc1ccc(Sc2nc(-c3ccc(Cl)cc3)c(CCC(=O)O)o2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.