The invention provides MRI detectable species of formula (I)
D
p
-S
n
-N
m
(I)
wherein D is a MRI detectable moiety
S is a spacer
N is a molecule of a nutrient or pseudo-nutrient
n is 0 or an integer
m is an integer and
p is an integer.
These compounds are useful for internalising into tumor cells an amount of the MRI detectable moiety that is distinguishably higher than the amount internalised in normal healthy cells thus allowing the diagnosis of tumors.
The internalisation of the MRI detectable moiety involves the nutrients or pseudo-nutrients transporting system. Preferred compounds of formula (I) are those wherein D is the chelated complex of a paramagnetic metal ion.
                            该发明提供了公式(I)Dp-Sn-Nm(I)的MRI可检测物种,其中D是MRI可检测的基团,S是一个间隔物,N是一种营养物质或伪营养物质的分子,n为0或整数,m为整数,p为整数。这些化合物对于将MRI可检测基团内化到肿瘤细胞中的数量大于内化到正常健康细胞中的数量非常有用,从而允许诊断肿瘤。MRI可检测基团的内化涉及营养物质或伪营养物质的运输系统。公式(I)的首选化合物是D为顺磁性
金属离子的螯合复合物。