Using COc1ccc(CN(Cc2ccc(-c3ccnc(Cl)n3)s2)C(=O)c2ccccc2)cc1 to produce O=C(NCc1ccc(-c2ccnc(Cl)n2)s1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.