Using C1=COCCC1, COC(=O)C(NC(=O)OCc1ccccc1)C(O)C(F)(F)F to produce O=C(NC(C(=O)O)C(OC1CCCCO1)C(F)(F)F)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.