Using CN(CC1(c2ccc(OCCCN3CCCC3)cc2)CCOCC1)C(=O)OC(C)(C)C to produce CNCC1(c2ccc(OCCCN3CCCC3)cc2)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.