| abstract |
Ionic compounds of the formula <IMAGE> wherein X is -CONR1R2, -CH2NHxAcyl or -CH2OH; Y is -NR3R4, -NHxAcyl or OR5; R1, R2, R3 and R4 can be identical or different, and each is hydrogen, C1-6- alkyl or C2-8-alkyl substituted by 1-5 OH groups and/or by one C1-3-alkoxy group, R5 is C1-6 alkyl or C2-8-alkyl substituted by 1-5 OH groups and/or by one C1-3-alkoxy group, and Acyl, which can be the same or different in X and Y, is C2-6-alkanoyl or C2-6-alkanoyl substituted by 1-4 OH groups and/or by one C1-3-alkoxy group, or a physiologically compatible salt thereof with an inorganic or organic base, have valuable properties as X-ray contrast agents. |