Disclosed are a dicarboxylic acid compound represented by the formula (I): ##STR1## wherein R represents hydrogen atom, a lower alkyl group, phenyl group or hydroxyl group; R.sup.1 represents a straight or branched alkyl group having 1 to 10 carbon atoms or a lower alkyl group substituted by a group selected from aryl group, a sulfur- or nitrogen-containing heterocyclic monocyclic group and a cycloalkyl group having 4 to 8 carbon atoms; R.sup.2 represents a substituted or unsubstituted aryl group, a cycloalkyl group having 4 to 8 carbon atoms or a sulfur-containing or nitrogen-containing heterocylcic group; X represents sulfur atom, oxygen atom or a substituted or unsubstituted imino group; Y.sup.1 represents imino group, oxygen atom or sulfur atom and Y.sup.2 represents nitrogen atom, or Y.sup.1 represents a vinylene group and Y.sup.2 represents a group: --CH.dbd.; m represents 0 to 3; and n represents 0 or 1, an ester thereof or pharmaceutically acceptable salts thereof, and a process for preparing the same.
揭示了一种由
化学式(I)表示的二
羧酸化合物:其中R代表氢原子、低碳烷基、苯基或羟基;R.sup.1代表具有1至10个碳原子的直链或支链烷基或被选自芳基、含
硫或含氮的杂环单环基团和具有4至8个碳原子的环烷基取代的低碳烷基团;R.sup.2代表取代或未取代的芳基、具有4至8个碳原子的环烷基或含
硫或含氮的杂环基团;X代表
硫原子、氧原子或取代或未取代的亚
氨基团;Y.sup.1代表亚
氨基团、氧原子或
硫原子,Y.sup.2代表氮原子,或Y.sup.1代表
乙烯基团,Y.sup.2代表一个基团:--CH.dbd.;m代表0至3;n代表0或1,其酯或其药学上可接受的盐,以及其制备方法。