Using O=C1CCOCC1, CC(C)(C)OC(=O)N[C@@H](CN)c1ccccc1 to produce CC(C)(C)OC(=O)N[C@@H](CNC1CCOCC1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.