Using COc1n[nH]c2ncc(N)cc12, O=C(O)c1c(F)ccc([N+](=O)[O-])c1F to produce COc1n[nH]c2ncc(NC(=O)c3c(F)ccc([N+](=O)[O-])c3F)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.