Using O=C(OC(Cl)(Cl)Cl)OC(Cl)(Cl)Cl, COc1ccc(C)c(Oc2ccc(NC(=O)[C@@H](C)N)cc2)c1 to produce COc1ccc(C)c(Oc2ccc(N3C(=O)N[C@H](C)C3=O)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.