Using CC(C)(C)OC(=O)N[C@H]1COC[C@H]1N1C(=O)c2ccccc2C1=O to produce CC(C)(C)OC(=O)N[C@H]1COC[C@H]1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.