CAS 2458-78-8 appears in our catalog under these names: Acetyl-l-threonine methyl ester, 95%, Acetyl-l-threonine Methyl Ester, Ac–Thr–OMe, Ac-Thr-OMe, 97%, (2S,3R)-Methyl 2-acetamido-3-hydroxybutanoate, 97%. Offered by: Combi-blocks, TRC, GLPBio, Ambeed, BLDpharm. Available pack sizes: 250mg, 5g, 1g, 100mg.