Complexing agents, complexes and complex salts

摘要

1. Compounds of the general formula I see diagramm : EP0130934,P14,F1 where R**1 represents a COOX group or the group see diagramm : EP0130934,P14,F2 R**2 and R**3 are the same or different and represent a hydrogen atom, a lower straight or branched chain hydrocarbon group, a phenyl or a benzyl group, or R**2 and R**3 together represent a trimethylene or tetramethylene group, R**4 represents a straight or branched chain mono- or polyhydroxyalkyl group, R**5 represents a hydrogen atom, a lower straight or branched chain optionally mono- or polyhydroxylated hydrocarbon group, Q represents the group -N-(CH2 )j -R**x , where j is a number 1 to 4 and R**x represents a COOX group or, when j 1, the group see diagramm : EP0130934,P14,F3 where k and m are the same or different and represent the numbers 0 or 2, I represents the numbers 1 or 2 and n and w are the same or different and represent the numbers 0 or 1, where n and w only represent the number 1 when k and m represent the number 2, and X represents hydrogen and/or metal ion equivalents, as well as their salts with physiologically acceptable bases.