A precursor used for labeling hepatocyte receptors and applied to radiotracers for imaging or pharmaceutical compositions for liver cancers is revealed. The precursor is a bifunctional compound. The bifunctional group includes a trisaccharide structure and a diamide dimercaptide (N
2
S
2
) ligand. The trisaccharide has high affinity to asialoglycoprotein receptors (ASGPR) on surfaces of hepatocytes while N
2
S
2
ligand reacts with radioisotopes to form neutral complexes. Thus the precursor stays on surfaces of hepatocytes to provide radioisotope labeling or treatment effect of liver cancers.
一种用于标记肝细胞受体并应用于用于肝癌成像或药物组合物的放射示踪剂的前体被揭示。该前体是一种双功能化合物。双功能基团包括三糖结构和二酰胺二巯基(N2S2)
配体。三糖具有高亲和力,能与肝细胞表面的非糖蛋白受体(ASGPR)结合,而N2S2
配体与放射性同位素反应形成中性络合物。因此,前体停留在肝细胞表面,提供放射同位素标记或治疗肝癌的效果。