Nc1ncnc2c1cnn2CCO    mol13820    0_1
Nc1[nH+]cnc2c1cnn2CCO    mol13820    1_1
Nc1ncnc2c1c[nH+]n2CCO    mol13820    1_2
Nc1nc[nH+]c2c1cnn2CCO    mol13820    1_3
[NH3+]c1ncnc2c1cnn2CCO    mol13820    1_4