Using CONC(=O)c1cc(-c2nn(C)c(OC(F)F)c2F)c(Cl)cc1Cl, O=C([O-])[O-] to produce CON=C(OC)c1cc(-c2nn(C)c(OC(F)F)c2F)c(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.