CAS 10236-58-5 appears in our catalog under these names: 3-Selenylalanine, min. 80 %, 5 mg, Selenocysteine/ 98%, 3 Selenylalanine, Selenocysteine 95%, (R)-2-Amino-3-hydroselenopropanoic acid, 95%, 95%. Offered by: Roth, TargetMol, Biosynth, Ambeed, Chemat. Available pack sizes: 5mg, 1mg, 10mg, 25mg, 100mg, 50mg, 2mg.