| abstract |
The present invention enables early and accurate diagnosis of amyloid-related diseases such as Alzheimer's disease. The general formula (Ia) [Wherein, X represents a sulfur atom, R 1 , R 2 , and R 4 represent a hydrogen atom, R 3 represents a dimethylamino group, and R 5 represents a dicyanovinyl group or the like. Or a compound obtained by labeling the compound with a labeling substance. [Selection figure] None |