Using O=C(O)COCCOCCOCC(=O)O, CC(=O)OC(CO)C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(=O)COCCOCCN to produce CC(=O)OC(CO)C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(=O)COCCOCCNC(=O)COCCOCCOCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.