O=[N+]([O-])C(CC([N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-]    mol9023    0_1
O=[N+]([O-])[C-](CC([N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-]    mol9023    -1_1