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