2-methyl-5-(2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-6-yl)pentanoic acid 5-(2-keto-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-6-yl)-2-methyl-valeric acid 30868-27-0 Biotin, .alpha.-methyl- NSC145151 1H-Thieno(3,4-d)imidazole-4-pentanoic acid, hexahydro-alpha-methyl-2-oxo- alpha-Methylbiotin NCI60_000979 2-Methyl-5-(2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid AIDS-127139 AIDS127139