Using CC(C)(C)OC(=O)N1CCN(C[C@@H](O)CN)CC1, O=C(Cl)OCc1ccccc1 to produce CC(C)(C)OC(=O)N1CCN(C[C@@H](O)CNC(=O)OCc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.