Z-Ala-Ala-Ala-Aib-Aib-OMe

N,N-diallyl-O-tert-butyl-L-tyrosyl-α-aminoisobutyryl-α-aminoisobutyric acid

Z-Gly-Aib-Aib-OH

L-Pro-L-Val-Aib-Aib-L-Gln-L-Gln-L-Phl

H-Val-Aib-Aib-OMe*HCl