Z-Ala-Phe-OH

Z-Pro-Gly-NH2

Na-Boc-Nd-pyrazinylcarbonyl-L-ornithine

Dimethyl((3S)-4,4-dimethyl-3-(Boc-amino)-2-oxopentyl)phosphonate

D-Norvaline benzyl ester 4-toluenesulfonate salt

Gly-Ala-Phe-OH

Gly-Leu-NH2HCl

Ile-Gly-Gly-OH

Leu-Ser-Phe-OH

Lysinoalanine2HCl (diastereomeric mixture: LL + LD)

N-Me-L-norleucine hydrochloride