Embodiments of the invention provide a compound accumulating in an inflammatory site, a diagnostic agent containing the compound in labeled state and its precursor compound for labeling. Such a compound accumulating in inflammatory site may be represented by the following formula (1):
Z—Y-Leu-Phe-(X)n-DLys(-(DLys)m-HalB)-(DLys)k-NH2 (1)
wherein
in the formula (1),
Z represents a protective group for an amino group;
Y represents Met or Nle;
X represents a spacer consisting of one or more of amino acid and/or synthetic organic compounds;
n represents 1 or 0;
m represents 1 or 0;
k represents 1 or 0; and
HalB represents a substituted benzoic acid having a radioactive halogen in an aromatic ring.
本发明的实施例提供了一种在炎症部位积累的化合物,一种含有标记状态下的该化合物的诊断剂以及用于标记的前体化合物。在炎症部位积累的这种化合物可以由以下公式(1)表示:Z—Y-Leu-Phe-(X)n-DLys(-(DLys)m-HalB)-(DLys)k-NH2(1)
在公式(1)中,Z代表
氨基的保护基;Y代表Met或Nle;X代表由一个或多个
氨基酸和/或合成有机化合物组成的间隔物;n代表1或0;m代表1或0;k代表1或0;HalB代表芳香环中含有放射性卤素的取代
苯甲酸。