CAS 49706-30-1 appears in our catalog under these names: Benzyl ((2S,3R)-1-hydrazinyl-3-hydroxy-1-oxobutan-2-yl)carbamate, 97%, Z-L-Threonine hydrazide, 95%, Cbz-Thr-NHNH2 95%, Z-L-Threonine hydrazide, 95%, 95%. Offered by: AmBeed, Combi-blocks, Chemat. Available pack sizes: 100g, 1g, 25g, 5g, 250mg.