CAS 309283-89-4 appears in our catalog under these names: (3-Mercapto-5h-[1,2,4]triazino[5,6-b]indol-5-yl)acetic acid, 95%, Cemtirestat, 95%, 2-(3-Mercapto-5H-[1,2,4]triazino[5,6-b]indol-5-yl)acetic acid, 95%, 95%, (2-Mercapto-1,3,4,9-tetraaza-fluoren-9-yl)-acetic acid, 95%. Offered by: Combi-blocks, AmBeed, Chemat, Fluorochem. Available pack sizes: 250mg, 1g, 100mg, 5g.