Using CCc1ccc(Nc2c(F)c(F)cc(F)c2F)c(CC(=O)N(C)C)c1, CCCCO to produce CCc1ccc(Nc2c(F)c(F)cc(F)c2F)c(CC(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.