O=C([O-])c1nc([O-])nc(O)[nH+]1 mol33824 -1_1 O=C([O-])c1nc(O)nc(O)n1 mol33824 -1_2 O=C(O)c1nc([O-])nc(O)n1 mol33824 -1_3 O=C(O)c1nc([O-])nc([O-])n1 mol33824 -2_1 O=C([O-])c1nc([O-])nc(O)n1 mol33824 -2_2