CAS 71989-18-9 appears in our catalog under these names: Fmoc–Glu(OtBu)–OH, Fmoc-L-glutamic acid 5-tert-butyl ester/ 99.68% (existing batch purity), Fmoc-L-Glu(OtBu)-OH*H2O, N-Fmoc-L-glutamic acid 5-tert-butyl ester, 98% , Fmoc-Glu(OtBu)-OH, 99.00%. Offered by: GLPBio, TargetMol, Iris Biotech, Thermo Scientific (Alfa Aesar), Chemat. Available pack sizes: 100g, 1g, 25g, 250g, 5g, 10g, 0,25kg, 0,5kg.