CAS 1820579-34-7 appears in our catalog under these names: 1-benzyl 4-methyl (2S)-2-{[(benzyloxy)carbonyl]amino}butanedioate, 95%, 1-Benzyl 4-methyl (2S)-2-{((benzyloxy)carbonyl)amino}butanedioate, 95%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 5g, 1g.