CONTRAST AGENTS

摘要

Compounds of formula (I) wherein R<1>, R<2> and R<3> are independently selected from: (i) saturated or unsaturated fatty acyl groups, preferably having from 14 to 24 carbon atoms, more preferably of a type found in nature; (ii) groups of formula (II) wherein R<4> and R<5> are independently selected from hydrogen atoms, C1-4 alkyl group and aryl groups, preferably C6-10 aryl groups, n represents the integers 0 or 1, A represents either a chemical bond or a straight or branched C1-6 alkylene chain and R<6> is a triiodinated phenyl group which may also carry other substituents.