Using O=C([O-])[O-], COc1nc(-c2cn[nH]n2)ccc1[N+](=O)[O-] to produce COc1nc(-c2cnn(C)n2)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.