CAS 334999-32-5 appears in our catalog under these names: N-Boc-trans-4-amino-L-proline methyl ester hydrochloride --absolute chemistry, 97%, N-Boc-trans-4-amino-l-proline methyl ester hydrochloride, 98%, (2S,4R)–1–tert–Butyl 2–methyl 4–aminopyrrolidine–1,2–dicarboxylate hydrochloride, trans-4-Amino-N-Boc-L-proline methyl ester hydrochloride, 97, (2S,4R)-1-tert-Butyl 2-methyl 4-aminopyrrolidine-1,2-dicarboxylate hydrochloride 98%. Offered by: Combi-blocks, GLPBio, Thermo Scientific (Alfa Aesar), Ambeed, Chemat. Available pack sizes: 1g, 5g, 10g, 25g, 100mg, 250mg.