CAS 40031-36-5 appears in our catalog under these names: 3,4-O-Isopropylidene-l-arabinose, 98%, (2R)-2-hydroxy-2-((4R,5S)-5-(hydroxymethyl)-2,2,4-trimethyl-1,3-dioxolan-4-yl)acetaldehyde, 98%, 3,4-O-Isopropylidene-L-arabinose. Offered by: Combi-blocks, AmBeed, Biosynth. Available pack sizes: 25g, 100g, 5g, 1g, 50g, 250g, 1000g, 500g.