Using COC(=O)c1ccc2[nH]c(-c3n[nH]cc3NC(=O)c3c(F)cccc3F)nc2c1 to produce O=C(O)c1ccc2[nH]c(-c3n[nH]cc3NC(=O)c3c(F)cccc3F)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.