Using COC(=O)c1ccc(N2CC3(CCN(C(=O)OC(C)(C)C)CC3)OC2=O)cc1 to produce COC(=O)c1ccc(N2CC3(CCNCC3)OC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.