CSC(=O)c1[nH]cnc1N    mol6640    0_1
CSC(=O)c1[nH]cnc1[NH3+]    mol6640    1_1
CSC(=O)c1[nH]c[nH+]c1N    mol6640    1_2
CSC(=O)c1[n-]cnc1N    mol6640    -1_1