O=C1C(O)=C([N+](=O)[O-])C(=O)C(O)=C1[N+](=O)[O-]    mol9611    0_1
O=C1C(O)=C([N+](=O)[O-])C(=O)C([O-])=C1[N+](=O)[O-]    mol9611    -1_1