O=C([O-])/C=[NH+]/O    mol15903    0_1
O=C(O)/C=N/O    mol15903    0_2
O=C(O)/C=N/[O-]    mol15903    -1_1
O=C([O-])/C=N/O    mol15903    -1_2
O=C([O-])/C=N/[O-]    mol15903    -2_1