Ceskoslovenska Akademie Ved

Petr Simek

Tomislav Barth

Karel Jost

Linda Servitova

Alena Machova

Frantisek Brtnik

Jirina Slantinova

The invention pertains to analogs of neurohypophysial hormones evidencing inhibition effects of the chemical formula I ##STR1## where A is CH.sub.3 CO or H, V is a residue of penicilamine or cysteine, B is CH.sub.3 or H, X is a residue of isoleucine or phenylalanine, Y is a residue of penicilamine or cysteine, and Z is a residue of leucine or lysine. These analogues evidence inhibition effects towards certain biological activities of neurohypophysial hormones.

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Petr Simek