A novel group of radiolabelled diamines are provided, effective for pancreatic imaging and represented by the formula ##STR1## wherein n is 1 to 10; R.sub.1 and R.sub.2 are the same or different and are hydrogen, hydroxyl or lower alkyl having 1 to 6 carbon atoms; R.sub.3 is lower alkyl having 1 to 6 carbon atoms; and N' is a nitrogen atom forming part of a 4- to 8-membered heterocyclic ring containing one or two hetero atoms, one of which is said nitrogen, said heterocyclic ring being unsubstituted or substituted with one or more lower alkyl groups and pharmaceutically acceptable acid addition salts thereof.
提供了一组新型的放射性标记二胺,用于胰腺成像,其
化学式如下:其中n为1至10;R.sub.1和R.sub.2相同或不同,分别为氢、羟基或具有1至6个碳原子的低碳基;R.sub.3为具有1至6个碳原子的低碳基;N'为氮原子,构成一个含有一个或两个杂原子(其中一个是氮原子)的4至8元杂环,该杂环未被取代或被一个或多个低碳基取代,以及其药用可接受的酸盐。