申请人:Dibra S.p.A.
公开号:US05649537A1
公开(公告)日:1997-07-22
Novel paramagnetic metal ion chelates and their use as contrast agents in the diagnostic technique known as "magnetic resonance imaging" (M.R.I.) of the gastrointestinal tract and particularly of the liver, are described. The novel compounds result from the conjugation of a bile acid with a chelating agent and are capable of chelating the ions of bivalent and trivalent metals. The compounds have formula A-L-B in which A is the residue of a bile acid and derivatives of a bile acid, B is the residue of a chelating agent of a bivalent or trivalent metal ion having an atomic number of 20 to 31, 39, 42, 43, 44, 49, 57 to 83, L is a ligand between A and B.
本发明描述了新型顺磁性金属离子螯合物及其作为“磁共振成像”(M.R.I.)诊断技术中胃肠道和特别是肝脏的对比剂的使用。这些新型化合物是由胆酸与螯合剂结合而成,能够螯合二价和三价金属离子。该化合物的化学式为A-L-B,其中A是胆酸及其衍生物的残基,B是具有原子序数20到31、39、42、43、44、49、57到83的二价或三价金属离子的螯合剂残基,L是连接A和B之间的配体。