Dicarboxylic acid bis-(3,5-dicarbomoyl-2,4,6-triiodoanilides) of general formula I ##STR1## wherein the amide radicals --CONR.sup.1 R.sup.2 and --CONR.sup.3 R.sup.4 are different from one another and R.sup.1 is a hydrogen, a lower alkyl radical or R.sup.2, R.sup.2 is a straight-chain or branched-chain monohydroxy or polyhydroxy alkyl radical, R.sup.3 is hydrogen, a lower alkyl radical or R.sup.4, R.sup.4 is a straight-chain or branched-chain monohydroxy or polyhydroxy alkyl radical, R.sup.5 is hydrogen, a lower alkyl radical or a monohydroxy or polyhydroxy alkyl radical, X is a straight-chain or branched-chain alkylene with 1 to 6 carbon atoms, which optionally can be substituted by 1 to 6 hydroxy or alkoxy groups or interrupted by one or more oxygen atoms, possess good pharmacological and physicochemical properties rendering them outstandingly suitable as radiopaque substances in X-ray contrast media for use in all fields of application for X-ray contrast media.
一般式I的二(3,5-二羧酰胺基-2,4,6-三
碘苯酰胺基)二
羧酸,其中酰胺基团--CONR.sup.1 R.sup.2和--CONR.sup.3 R.sup.4彼此不同,R.sup.1是氢、较低的烷基基团或R.sup.2,R.sup.2是直链或支链的单羟基或多羟基烷基基团,R.sup.3是氢、较低的烷基基团或R.sup.4,R.sup.4是直链或支链的单羟基或多羟基烷基基团,R.sup.5是氢、较低的烷基基团或单羟基或多羟基烷基基团,X是具有1至6个碳原子的直链或支链烷基,可以选择地被1至6个羟基或烷氧基取代,或者被一个或多个氧原子打断,具有良好的药理学和物理
化学性质,使其非常适合作为X射线造影介质中的放射性物质,在X射线造影介质的所有应用领域中使用。