CAS 160141-86-6 appears in our catalog under these names: methyl (2S)-2-{[(tert-butoxy)carbonyl]amino}-4-methanesulfonylbutanoate, 98%, (S)-Methyl 2-((tert-butoxycarbonyl)amino)-4-(methylsulfonyl)butanoate, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 5g, 1g.