CSc1[nH+]cnc([O-])c1C mol2194 0_1 CSc1ncnc(O)c1C mol2194 0_2 CSc1nc[nH+]c(O)c1C mol2194 1_1 CSc1[nH+]cnc(O)c1C mol2194 1_2 CSc1ncnc([O-])c1C mol2194 -1_1