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