Using COC(=O)c1ccccc1COc1ccc(CCNC(=O)Nc2ccc(F)cc2F)cc1 to produce O=C(NCCc1ccc(OCc2ccccc2C(=O)O)cc1)Nc1ccc(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.