5,5'-/(1,3-propanediyl) bis-/imino(2-oxo-2,1-ethanediyl) acetylimino/bis(2, 4,6-triiodo-1,3-benzenedi carboxylamides), and contrast media containing them

摘要

##STR1## wherein R, R', R.sub.1, and R.sub.1 ', which are the same or different, are H, C.sub.1 -C.sub.4 alkyl, linear or branched C. sub.1 -C. sub.4 mono- or polyhydroxyalkyl;PPR.sub.2, R. sub.2 ', R. sub.3, and R.sub.3 ', which are the same or different, are one of the groups of formula --CH.sub.2 CH.sub.2 OH, --CH.sub.2 CH(OH) CH. sub.2 OH -- CH(CH.sub.2 OH)CH(OH)CH.sub.2 OH, --CH.sub.2 (CHOH).sub.4 CH. sub.2 OH, or --CH(CH.sub.2 OH).sub.2 ; and X is one of the groups --CH(OH) --, --CH(CH. sub.2 OH)--, --C(OH) (CH.sub.2 OH)--, or --C(CH.sub.2 OH). sub.2 --, are useful as opacifying components for X-ray contrast media.