A compound having the formula:
or a pharmaceutically acceptable salt thereof, wherein A is an amino acid identifying group; B is a hydrogen atom, an alkyl group having 1-5, inclusive, carbon atoms, or an aralkyl group having 6-12, inclusive, carbon atoms; carbon atom 2 is of the R configuration; and carbon atom 3 is of the R configuration.
一种具有以下式子的化合物
或其药学上可接受的盐,其中 A 是
氨基酸识别基团;B 是氢原子、具有 1-5 个(含)碳原子的烷基或具有 6-12 个(含)碳原子的芳烷基;碳原子 2 是 R 构型;碳原子 3 是 R 构型。