CAS 33996-30-4 appears in our catalog under these names: Ethyl 4-hydroxypyrrolidine-2-carboxylate hydrochloride, 95%, Ethyl (2S,4R)–4–hydroxypyrrolidine–2–carboxylate hydrochloride, (2S,4R)-Ethyl 4-hydroxypyrrolidine-2-carboxylate hydrochloride, 97%, (2S,4R)-Ethyl 4-hydroxypyrrolidine-2-carboxylate hydrochloride, 98%, H-Hyp-OEt hydrochloride, 98%. Offered by: Combi-blocks, GLPBio, Fluorochem, BLDpharm, Chemat. Available pack sizes: 1g, 5g, 100g, 500g, 25g, 250mg, 10g.