O=[N+]([O-])CCC([N+](=O)[O-])[N+](=O)[O-]    mol9040    0_1
O=[N+]([O-])CC[C-]([N+](=O)[O-])[N+](=O)[O-]    mol9040    -1_1
O=[N+]([O-])[CH-]CC([N+](=O)[O-])[N+](=O)[O-]    mol9040    -1_2