CYCLOPEPTIDES AND PHARMACEUTICAL PREPARATIONS THEREOF, PROCESS FOR THEIR PREPARATION AND THEIR USE

摘要

The somatostatin-analogous cyclic octapeptides according to the invention of the general formula (I) in which trp represents L-Trp or D-Trp, in which the benzene ring may be substituted by a halogen atom, and Gaba(Ar) represents the residue of a gamma -aminobutyric acid substituted by a cyclic hydrocarbyl radical, and their acid addition salts and complexes are distinguished by a strong inhibition of the insulin and glucagon secretion of the pancreas and are therefore therapeutically acceptable, preferably in the form of pharmaceutical preparations, in similar indications to those of somatostatin, especially as anti-diabetics. The compounds are manufactured by conventional processes of peptide synthesis, especially by liberation from corresponding protected intermediates after intramolecular cyclization of a corresponding linear octapeptide.