CAS 42406-52-0 appears in our catalog under these names: N-Alpha-phthalyl-l-asparagine, 95%, (S)-4-Amino-2-(1,3-dioxoisoindolin-2-yl)-4-oxobutanoic acid, 98%, Pht-Asn-OH. Offered by: Combi-blocks, AmBeed, Biosynth. Available pack sizes: 1g, 25g, 5g, 10g.