CNc1ncnc2scnc12 mol4969 0_1 CNc1nc[nH+]c2scnc12 mol4969 1_1 CNc1[nH+]cnc2scnc12 mol4969 1_2 C[NH2+]c1ncnc2scnc12 mol4969 1_3 CNc1ncnc2sc[nH+]c12 mol4969 1_4