摘要:
A radiolabeled nucleoside analogue is provided, which includes radioactive iodine 123I/131I, and a nucleoside analogue selected from a group consisting of cytidine, thymidine, uridine, and a derivative thereof. A method for preparing the radiolabeled nucleoside analogue, and a use thereof are further provided. The nucleoside analogue, prepared through the preparation method with a short synthesis time and a high radiochemical yield, has a long in vivo physiological half life and a high stability in serum, and, as a radiopharmaceutical composition, is useful in development of tumor proliferation diagnosis or therapy prognosis evaluation, and further assists in observation of long-time in vivo metabolism of a drug.
摘要:
A method for preparing a precursor used to label hepatocyte receptors is revealed. The precursor contains a bifunctional structure including trisaccharide and DTPA ligand. During synthesis processes of the precursor, silica gel columns and Reverse phase-18 (RP-18) columns are used for purification. Thus both the purification times and cost of each purification are reduced. Moreover, use diethyl ether to facilitate precipitation of products and remove a part of coupling reagent. Removing the coupling reagent helps purification of products. Furthermore, Nα,Nα-bis(carboxymethyl)-L-lysine hydrate and benzyl chloroformate are coupled to form a trisaccharide skeleton so as to ensure the yield rate of trisaccharide structure.
摘要:
A precursor SnBZM for a dopamine receptor radiotracer and a method for preparing the same are revealed. The precursor includes a tributyltin group (Bu3Sn) that is easy to be replaced. Thus a dopamine receptor radiotracer 123I-IBZM can be produced at high yield rate by a substitution reaction of the precursor. At the same time, both the method for preparing the precursor SnBZM and a method for preparing a reference standard IBZM are simplified. Moreover, stability of each product is improved.
摘要:
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 (N2S2) ligand. The trisaccharide has high affinity to asialoglycoprotein receptors (ASGPR) on surfaces of hepatocytes while N2S2 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.
摘要翻译:用于标记肝细胞受体并应用于放射性示踪剂以用于肝癌成像的前体或用于肝癌的药物组合物。 前体是双官能化合物。 双官能团包括三糖结构和二酰胺二硫醇(N 2 S 2)配体。 三糖对肝细胞表面的脱唾液酸糖蛋白受体(ASGPR)具有高亲和力,而N2S2配体与放射性同位素反应形成中性复合物。 因此,前体停留在肝细胞的表面,以提供肝癌的放射性同位素标记或治疗效果。