position 6, gonadoliberina veterinary pharmaceutical compositions derived from them are happy acid and process for the amminocarbossilico aromatic in their preparation.

摘要

The invention relates to novel gonadoliberin nonapeptide ethylamide or decapeptide amide derivatives of the general formula (I), Glp-His-Trp-Ser-Tyr-X1-X2-X3-Pro-X4 (I) wherein X1 stands for a 2-aminobenzoic or 3-aminobenzoic acid group; X2 stands for a leucyl, tryptophyl or phenylalanyl group; X3 means an arginyl, leucyl or glutaminyl group; and X4 represents a glycylamide or ethylamide group, as well as their acid addition salts and pharmaceutical presparations containing these compounds. Further on, the invention relates to a process for preparing these compounds and preparations. The gonadoliberin derivatives of the invention can more effectively be used for reproduction biological purposes as compared to the derivatives known so far.