1,2,4-Triazolidine-3-thione, 5-imino- 16691-43-3 3-Amino-5-mercapto-1,2,4-triazole 3-Imino-5-thiourazole 3H-1,2,4-Triazole-3-thione, 5-amino-1,2-dihydro- ENT 61388 Iminothiourazole NSC34807 s-Triazole-3-thiol, 5-amino-