C[n+]1cnc([O-])c2nccnc21    mol26207    0_1
[CH2-][n+]1cnc(O)c2nccnc21    mol26207    0_2
C[n+]1cnc(O)c2nccnc21    mol26207    1_1
C[n+]1cnc([O-])c2[nH+]ccnc21    mol26207    1_2
C[n+]1cnc([O-])c2ncc[nH+]c21    mol26207    1_3