Using CC(C)C[C@@H](NC(=O)OC(C)(C)C)C(=O)NC1Cc2cccc(N)c2NC1=O, O=C(Cl)CCCCl to produce CC(C)C[C@@H](NC(=O)OC(C)(C)C)C(=O)NC1Cc2cccc(NC(=O)CCCCl)c2NC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.