Patent ID: 6989371

Claim:
A peptide of the formula X-D-Phe-Gln-R 1 -R 2 -Val-R3-His-R- 4 -NH 2 wherein X is acetyl or straight, branched or cyclic alkanoyl group from 3–16 carbon atoms, or X is deleted R1 is Trp or D-Trp, R2 is Ala, Aib or Deg, R3 is Gly, Aib, Deg, Dpg or Ac5c, R4 is Leu or Ile wherein at least one of R2 or R3 is an α,α-dialkylated amino acid; or a pharmaceutically acceptable salt of the peptide wherein Aib is α-aminoisobutyric acid, Deg is α,α-diethyl glycine, Dpg is α,α-di-n-propyl glycine and Ac5c is 1-amino-cyclo pentane carboxylic acid.