Using CC(C)(C)OC(=O)N1C[C@@H](O)[C@H](NC(=O)OCc2ccccc2)C1 to produce O=C(N[C@@H]1CNC[C@H]1O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.