CAS 80963-12-8 appears in our catalog under these names: 4-benzyl 1-methyl (2S)-2-{[(tert-butoxy)carbonyl]amino}butanedioate, 95%, (S)-4-Benzyl 1-methyl 2-((tert-butoxycarbonyl)amino)succinate, 95%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 5g.