Metal chelates capable of exhibiting an immobilized relativity between about 60 and 200 mM
−1
s
−1
/metal atom are useful as magnetic resonance imaging agents. Additionally, a compound which is useful as a metal-chelating ligand has the following formula:
1
wherein
Q is a 4- to an 8-membered carbocyclic ring which may be fully or partially saturated;
t is an integer from 2 to 16;
each R group is independently hydrogen, —OH, —CH
2
-A, —OCH
2
CH(OH)CH
2
-A or a functional group capable of forming a conjugate with a biomolecule, provided that at least two of the R groups are selected from —CH
2
-A or —OCH
2
CH(OH)CH
2
-A; and
A is a moiety capable of chelating a metal atom.
能够表现出大约60到200 mM-1s-1/
金属原子之间的固定相对性的
金属螯合物可用作磁共振成像剂。此外,以下化合物可用作
金属螯合
配体:1其中Q是一个4至8个成员的碳环,可以完全或部分饱和;t是2至16的整数;每个R基团独立地为氢,-OH,-
CH2-A,-O CH(OH) -A或能够与
生物分子形成共轭的功能基团,前提是至少选择两个R基团来自- -A或-O CH(OH) -A;A是能够螯合
金属原子的基团。