Using COC(=O)C(NC(=O)N1CCc2cnc(NC3CCOCC3)nc2C1)c1ccc(Cl)c(F)c1 to produce O=C(O)C(NC(=O)N1CCc2cnc(NC3CCOCC3)nc2C1)c1ccc(Cl)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.