((R)-1-phenylethyl)-L-valine

cis-cyclo(Val-Phe)

(3R,6S)-N,N'-bis-(4-methoxybenzyl)-3-benzyl-6-isopropyl-piperazine-2,5-dione

(S)-2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-3-methyl-butyric acid (S)-3,4,4-trimethyl-2-oxo-tetrahydro-furan-3-yl ester

N-Benzoyl-(S)-valin-N'-tert-butylamid