PROBLEM TO BE SOLVED: To enable provision of compounds capable of performing, e.g., 68Ga-DOTA labeling to, e.g., an amino group of a biomolecule after coordination of 68Ga or the like to a compound including a ligand such as DOTA(1,4,7,10-tetraazacyclodecane-1,4,7,10-tetraacetic acid).SOLUTION: There are provided compounds represented by the general formula (I) in the figure or salts thereof.COPYRIGHT: (C)2015,JPO&INPIT【課題】DOTA(1,4,7,10-テトラアザシクロデカン-1,4,7,10-テトラ酢酸)などの配位子を含有する化合物に68Ga等を配位させた後に、生体分子のアミノ基等への68Ga-DOTA標識等を実施可能な化合物の提供を可能とする。【解決手段】下記一般式(I)で表される化合物またはその塩。【化1】【選択図】図3