| abstract |
The invention relates to metabolically labile water-insoluble esters of formula (I), wherein R?1 is an aliphatic, araliphatic, aryl or heterocyclic group; R?2 is hydrogen or an aliphatic, aryl or araliphatic group; R?3 is as defined for R?1, or R?3 and R?2 together form an alkylene chain; the molecule containing at least one iodine atom and being metabolised to form products which are soluble in body fluids. The esters are used in X-ray and ultrasound image enhancement. |