Using O=C(NCCCCc1ccc(OCC(=O)N(CCO)CCO)cc1)OCc1ccccc1 to produce NCCCCc1ccc(OCC(=O)N(CCO)CCO)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.