CAS 62023-63-6 appears in our catalog under these names: Bestatin Impurity 1, (2R,3S)-3-Amino-2-hydroxy-4-phenylbutanoic acid, (2R,3S)-3-Amino-2-hydroxy-4-phenylbutanoic acid, 95%, 95%, (2R,3S)-3-Amino-2-hydroxy-4-phenylbutano, ic acid, 250 mg, (2R,3S)-3-Amino-2-hydroxy-4-phenylbutano, ic acid, 500 mg. Offered by: Chemat Brand, Biosynth, Chemat, Roth, Fluorochem. Available pack sizes: on request, 500mg, 250mg, 1000mg, 10000mg, 5000mg, 1g, 5g.