CAS 89-67-8 appears in our catalog under these names: (3R,4S,5S)-3,4-Dihydroxy-5-((1R,2R)-1,2,3-trihydroxypropyl)dihydrofuran-2(3H)-one, 97%, (3R,4S,5R)–3,4–Dihydroxy–5–((1S,2R)–1,2,3–trihydroxypropyl)dihydrofuran–2(3H)–one, D-Glucoheptono-1,4-lactone, D-Glycero-D-gulo-heptono-1,4-lactone, 95.0%. Offered by: AmBeed, GLPBio, Biosynth, MedChemExpress. Available pack sizes: 5g, 100mg, 10g, 1g, 250mg, 25g, 50g, 100g.