CONTRAST MEDIA FOR X-RAY AND MAGNETIC RESONANCE IMAGING

摘要

PCT No. PCT/GB95/00065 Sec. 371 Date Oct. 4, 1996 Sec. 102(e) Date Oct. 4, 1996 PCT Filed Jan. 13, 1995 PCT Pub. No. WO95/19186 PCT Pub. Date Jul. 20, 1995The present invention relates to metabolically labile esters, and to contrast media for X-ray and magnetic resonance imaging comprising these esters. The esters have formula (I): in which R3 is asteroid residue. The esters contain at least one iodine atom and/or heavy metal atom. The compound are metabolizable to products which are soluble in body fluids and are physiologically acceptable.