New partially retro-inverso peptides of the following general formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and represent, each independently, the side chain of the aminoacid residues present in the naturally occuring peptides, X is --S--Ph or --O--CH.sub.2 --Ph and Z is a hydroxy, alkoxy or amino group, are described as well as a suitable method for their preparation. The new compounds are useful as antihypertensive agents.
以下是新的部分反向肽的一般公式:##STR1## 其中R.sup.1和R.sup.2相同或不同,每个都代表自然存在的肽中
氨基酸残基的侧链,X为--S--Ph或--O--CH.sub.2--Ph,Z为羟基,烷氧基或
氨基。同时描述了一种适用于它们制备的合适方法。这些新化合物可用作降压剂。