[CH2-][n+]1cn(C)c2ncnc(O)c21    mol38092    0_1
Cn1c[n+](C)c2c([O-])ncnc21    mol38092    0_2
Cn1c[n+](C)c2c([O-])nc[nH+]c21    mol38092    1_1
Cn1c[n+](C)c2c(O)ncnc21    mol38092    1_2