CAS 73872-71-6 appears in our catalog under these names: (R)–5–(tert–Butoxy)–4–((tert–butoxycarbonyl)amino)–5–oxopentanoic acid, Boc-D-Glu-OtBu, N-Boc-D-glutamic acid 1-tert-butyl ester, 95% , Boc-D-glutamic acid alpha-tert-butyl ester, Boc-D-Glu-OtBu 97% （contains~6.0% water）. Offered by: GLPBio, Iris Biotech, Thermo Scientific (Alfa Aesar), Biosynth, Ambeed. Available pack sizes: 10g, 25g, 5g, 1g, 2000mg, 5000mg, 10000mg, 100g.