Hoechst Aktiengesellschaft

Axel Friedrich

Volker Teetz

Rolf Geiger

Wolfgang Konig

Jurgen K Sandow

The invention relates to cyclic hexapeptides of the general formula III ##STR1## in which X represents the radical of an L-aminoacid of the general formula IIIa ##STR2## in which A and B are identical or different and denote alkyl having 1 to 3 carbon atoms, or A and B together represent a saturated, unsaturated or aromatic monocyclic or bicyclic structure having 3 to 6 carbon atoms, n denotes 0 or 1, and Y represents an aliphatic or aromatic L-aminoacid the side chain of which can be hydroxylated, and their salts with physiologically tolerated acids, and to a process for their preparation and their use and their intermediates.

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Frankfurt am Main, Germany

Axel Friedrich