1,3-Vinylenethiourea 1H-Imidazole-2-thiol 2-Mercaptoimidazole 2-Thioxo-2,3-dihydroimidazole 2H-Imidazole-2-thione, 1,3-dihydro- 4-Imidazoline-2-thione 872-35-5 Imidazole, 2-mercapto- Imidazole-2-thiol NSC112715 Usaf el-57 WLN: T5M CNJ BSH