Using CCOC(=O)c1sc(N2CCOCC2)nc1Cc1ccc(Cl)c(Cl)c1 to produce OCc1sc(N2CCOCC2)nc1Cc1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.