| abstract |
(57) [Summary] (Modified) [Structure] Formula with extremely high coupling constant for metal ions [X is C 6-to C 14 -arylene which may contain a hetero atom grouping, or C 1 which contains a hetero atom group (N, O, S (1 ×, several times)) -~ Represents C 20 -alkylene, X 'and X "is a hydrogen represents the like, C 1 -~C 10 - alkyl or C 6 -~C 10 - aryl, R represents hydrogen, one equivalent or an alkaline earth metal ammonium or alkali metal 1 / 2 equivalent, n is 0, 1, 2, 3 Or 4 and R'represents C 1 -to C 4 -alkyl, chlorine or bromine]. [Effect] The above compound has a complexing affinity. It can be used in medicine, diagnostics or environmental protection. |