Blodkoagulationsinhiberende hirudinderivater, fremgangsmåde til deres udvinding, deres anvendelse samt middel indeholdende dem

The invention relates to polypeptides of the formula I (I) in which m denotes 0-50, n denotes 0-100 and R denotes the phenolic hydrogen or a phenol ester group, X represents identical or different residues of naturally occurring alpha -amino acids, Y denotes Val, Ile, Thr, Leu or Phe, and Z represents identical or different residues of naturally occurring alpha -amino acids, and in which the Cys residues are linked pairwise via disulfide bridges, to a process for preparing or obtaining them and to agents containing them.