Using CC(=O)c1ccc2n1-c1ccccc1OC21CCN(C(=O)OC(C)(C)C)CC1 to produce CC(=O)c1ccc2n1-c1ccccc1OC21CCNCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.