Using COC(=O)CCC(CCCCNS(=O)(=O)c1ccc(Cl)cc1)CCn1ccnc1 to produce O=C(O)CCC(CCCCNS(=O)(=O)c1ccc(Cl)cc1)CCn1ccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.