Na-Ac-Ng-Boc-L-2,4-diaminobutyric acid

S-Benzyl-D-penicillamine

Boc-D-propraglycine dicyclohexylammonium salt

Ac-Phe-Tyr-NH2

Cyclo(L-His-L-Pro)

Glutathione-diethyl ester (reduced)

D-Val-D-Val-OH

Gly-Phe-pNA

Gly-Gly-His-OH

L-Lysine b-naphtylamide carbonate

Trp-Gly-Gly-OH