Boc-Met-β-Ala-Phe-OMe
(S)-2-[4-((S)-2-tert-Butoxycarbonylamino-4-methylsulfanyl-butyrylamino)-butyrylamino]-3-phenyl-propionic acid methyl ester
Boc-Met-pNA
(S)-N-(tert-butoxycarbonyl)methionine amide
(S)-2-{[(S)-1-((S)-2-tert-Butoxycarbonylamino-4-methylsulfanyl-butyryl)-azetidine-2-carbonyl]-amino}-3-phenyl-propionic acid methyl ester