CAS 56859-26-8 appears in our catalog under these names: N-Nitroso Biotin, 1'-Nitrosobiotin, >95% (HPLC), Nitrosobiotin, 5-((3αS)-1-Nitroso-2-oxo-(3αr,6αc)-hexahydro-thieno(3,4-d)imidazol-4t-yl)-pentanoic acid, N-NITROSO BIOTIN SOLUTION. Offered by: Chemat Brand, TRC, TargetMol, GLPBio, Biosynth. Available pack sizes: on request, 250mg, 25mg, 50mg, 2mg, 10mg, 100mg, 5mg.