The invention relates to novel gonadoliberin nonapeptide ethylamide or decapeptide amide derivatives of the general formula (I), Glp-His-Trp-Ser-Tyr-X.sub.1 -X.sub.2 -X.sub.3 -Pro-X.sub.4 (I) wherein X.sub.1 stands for a 2-aminobenzoic or 3-aminobenzoic acid group; X.sub.2 stands for a leucyl, tryptophyl or phenylalanyl group; X.sub.3 means an arginyl, leucyl or glutaminyl group; and X.sub.4 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.
本发明涉及一种新型的Gonadoliberin非肽九肽乙
酰胺或十肽
酰胺衍
生物,其通式为(I):Glp-His-Trp-Ser-Tyr-X.sub.1-X.sub.2-X.sub.3-Pro-X.sub.4(I),其中X.sub.1代表
2-氨基苯甲酸或3-
氨基
苯甲酸基团;X.sub.2代表亮
氨酰基、色
氨酰基或
苯丙
氨酰基;X.sub.3表示精
氨酰基、亮
氨酰基或谷
氨酰基;X.sub.4表示甘
氨酰胺或乙
酰胺基团,以及它们的酸加成盐和含有这些化合物的制药制剂。此外,本发明还涉及一种制备这些化合物和制剂的方法。与迄今为止已知的衍
生物相比,本发明的Gonadoliberin衍
生物可以更有效地用于生殖
生物学目的。