专利号:US-5919433-A 优先权日:1996-12-04 标 题:Macrocyclic metal complex carboxylic acids, their use as well as process for their production 发明人:PLATZEK JOHANNES; RADUECHEL BERND; SCHMITT-WILLICH HERIBERT 权利人:SCHERING AG 摘要:The invention relates to new macrocyclic metal complex carboxylic acids of formula II whereby Zo stands for a metal ion equivalent of atomic numbers 58-71 and R stands for a CHX1-CO-NH-CHY1-(CH2)f-COOH group, in which X1 and Y1, independently of one another, mean a hydrogen atom, a straight-chain or branched C1-C7 alkyl radical, a phenyl or benzyl group and f means numbers 0 to 9. They can be used as intermediate stages for synthesis of cascade polymer complexes that are suitable as diagnostic agents.