New proline derivatives of the general formula: ##STR1## wherein R stands for a lower alkyl group and X for a N-terminal protective group conventional in amino acid chemistry or an acyl group derived from an amino acid with a protective group at the N-terminal. They have inhibitory activity against prolylendopeptidase and are relatively chemically stable as compared with known compounds of this type.
新的脯
氨酸衍
生物的一般公式为:##STR1##其中R代表一个较低的烷基基团,X代表
氨基酸化学中常见的N-末端保护基团或者来自带有N-末端保护基团的
氨基酸的酰基基团。它们具有对脯
氨酰内肽酶的抑制活性,并且与已知的此类化合物相比具有相对较高的
化学稳定性。