| 摘要 |
Dicarboxylic acid bis-(3,5-dicarbomoyl-2,4,6-triiodoanilides) of general formula I <IMAGE> wherein the amide radicals -CONR1R2 and -CONR3R4 are different from one another and R1 is a hydrogen, a lower alkyl radical or R2, R2 is a straight-chain or branched-chain monohydroxy or polyhydroxy alkyl radical, R3 is hydrogen, a lower alkyl radical or R4, R4 is a straight-chain or branched-chain monohydroxy or polyhydroxy alkyl radical, R5 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.
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