Z-D-β-Glutamic acid 5-tert-butyl ester

Z-L-β-Homoaspartic acid 5-tert-butyl ester

(S)-3-(((Benzyloxy)carbonyl)aMino)-5-(tert-butoxy)-5-oxopentanoic acid

Z-D-β-Glutamic acid 5-tert-butyl ester, Z-L-β-Glutamic acid 5-tert-butyl ester, Z-L-β-Homoaspartic acid 5-tert-butyl ester