Using CCOC(=O)c1cnn(-c2nc3cc(F)cc(F)c3c(=O)[nH]2)c1 to produce O=C(O)c1cnn(-c2nc3cc(F)cc(F)c3c(=O)[nH]2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.