CAS 1464-42-2 appears in our catalog under these names: 2-Amino-4-(methylselanyl)butanoic acid, 98%, Selenomethionine, >95% (HPLC), Selenomethionine/ 99.37% (existing batch purity), Selenomethionine (Seleno–DL–methionine), DL-Selenomethionine, >98.0%(HPLC)(T). Offered by: Fluorochem, TRC, TargetMol, GLPBio, TCI. Available pack sizes: 100mg, 250mg, 1g, 25mg, 50mg, 200mg, 10mM (in 1ml water), 500mg.