The present invention provides anti-tumor peptides of Formula I, A-B-N (CH.sub.3)-CHD-CH(OCH.sub.3)-CH.sub.2 CO-Pro-Pro-K (I), and the acid salts thereof. A is an amino acid residue of the formula (CH.sub.3).sub.2 N--CHX--CO, wherein X is a normal or branched alkyl group. B is an amino acid residue selected from the group consisting of valyl, isoleucyl, leucyl, and 2-t-butylglycyl. D is a normal or branched C.sub.3 -C.sub.4 -alkyl group. K is a t-butoxy group or a substituted amino group. An additional embodiment of the present invention is a method for treating a malignancy in a mammal, such as a human, comprising administering to the mammal an effective amount of a compound or compounds of Formula I in a pharmaceutically acceptable composition.
本发明提供了式I,A-B-N(CH.sub.3)-C
HD-CH(OCH.sub.3)-CH.sub.2 CO-Pro-Pro-K(I)及其酸盐的抗肿瘤肽。其中,A是公式(CH.sub.3).sub.2N-CHX-CO的
氨基酸残基,其中X是正常或支链烷基。B是从缬
氨酸、
异亮氨酸、亮
氨酸和2-叔丁基甘
氨酸中选择的
氨基酸残基。D是正常或支链C.sub.3-C.sub.4烷基。K是叔丁
氧基或取代
氨基。本发明的另一实施例是一种用于治疗哺乳动物(如人类)恶性肿瘤的方法,包括向哺乳动物内部施用式I化合物或化合物的有效量,其处于一种药学可接受的组合物中。