Using O=C1CCC(=O)N1Cl, CC(C)(C)OC(=O)N[C@@H](Cc1cn(CC(C(=O)c2ccc(Cl)cc2Cl)c2ccccc2)cn1)C(=O)O to produce CC(C)(C)OC(=O)N[C@@H](Cc1cn(CC(Cl)(C(=O)c2ccc(Cl)cc2Cl)c2ccccc2)cn1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.