CAS 44520-54-9 appears in our catalog under these names: D-Allo-threoninol, 95%, D-allo-Threoninol, (2S,3R)-2-Aminobutane-1,3-diol 97%, D-allo-Threoninol, 97%, 97%, (2S,3R)-2-Aminobutane-1,3-diol, 97%. Offered by: Combi-blocks, Biosynth, Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 1g, 250mg, 5g, 50mg, 500mg, 1000mg.