1,3-Vinylenethiourea 1H-Imidazole-2-thiol 2-Mercaptoimidazole 2-Thioxo-2,3-dihydroimidazole 2H-Imidazole-2-thione, 1,3-dihydro- 4708-60-5 55107-84-1 872-35-5 AI3-61065 EINECS 212-823-4 IMIDAZOLE-2-THIOL Imidazole, 2-mercapto- NSC 112715 USAF EL-57