O=C(O)c1c(O)cccc1[N+](=O)[O-]    mol1791    0_1
O=C(O)c1c([O-])cccc1[N+](=O)[O-]    mol1791    -1_1
O=C([O-])c1c(O)cccc1[N+](=O)[O-]    mol1791    -1_2