CAS 35924-87-9 appears in our catalog under these names: 4-(5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamido)butanoic acid, 95%, 95%, N-Biotinyl-4-aminobutanoic acid. Offered by: Chemat, MedChemExpress. Available pack sizes: 50mg, 100mg, 250mg, 50 mg, 25 mg, 5 mg, 250 mg, 100 mg.