Using CC(=O)c1cc(OC2CCN(C(=O)OC(C)(C)C)CC2)ccn1 to produce CC(O)c1cc(OC2CCN(C(=O)OC(C)(C)C)CC2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.