Using CC(=O)Oc1ccccc1C(=O)O, O=C(NCCCO)OCc1ccccc1 to produce CC(=O)Oc1ccccc1C(=O)OCCCNC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.