(R)-2-amino-5-cyano-N-phenylpentanamide hydrochloride

(R)-2-chloroacetaminohexanedioic acid

ethyl (1'S,2R,5R)-1-benzyloxycarbonyl-3-(1'-phenyl-1'-ethyl)-5-(3-ethoxycarbonylpropyl)imidazolidin-4-one-2-carboxylate

D-Boc-Asp-O-Bzl