The invention relates to a polypeptide of formula I:-
R¹-CO-A¹-A²-A³-A³-A⁴-A⁵-A⁶-Q I
wherein each of the generic terms is disclosed in full in the specification and includes:-
R¹ is a 5- or 6-membered unsaturated heterocyclic ring which contains one, two or three nitrogen atoms, which ring may optionally bear one or two substituents; A¹ is a direct link to A², or is His or D-His; A² is Trp or MeTrp; A³ is Ala or MeAla; A⁴ is Val; A⁵ is Gly or D-Ala; A⁶ is His or Lys(Z); and Q is a group of the formula -A⁷.R² in which A⁷ is Leu or MeLeu and R² is hydroxy, amino, (1-3C)alkylamino or (1-3C)alkoxy; or Q is (1-6C)alkoxy or (1-10C)alkylamino.
The compounds possess antagonist properties against bombesin-like peptides and are of value in the treatment of malignant disease in warm-blooded animals.
本发明涉及式 I 的
多肽
r¹-co-a¹-a²-a³-a³-a⁴-a⁵-a⁶-q i
其中每个通用术语在说明书中均有完整披露,包括
R¹ 是含有一个、两个或三个
氮原子的 5 元或 6 元不饱和杂环,该环可任意带有一个或两个取代基;A¹ 与 A² 直接相连,或者是 His 或 D-His;A² 是 Trp 或 MeTrp;A³ 是 Ala 或 MeAla;A⁴ 是 Val;A⁵ 是 Gly 或 D-Ala;A⁶ 是 His 或 Lys(Z);以及 Q 是式 -A⁷ 的基团。其中 A⁷ 是 Leu 或 MeLeu,R² 是羟基、
氨基、(1-3C)烷基
氨基或(1-3C)烷
氧基;或 Q 是 (1-6C)alkoxy 或 (1-10C)烷基
氨基。
这些化合物具有拮抗炸弹素样肽的特性,在治疗温血动物的恶性疾病方面具有价值。