| 摘要 |
PROBLEM TO BE SOLVED: To provide a labeled compound that can be detected by positron emission tomography (PET) with good sensitivity without being combined with a metabolism inhibitor and makes it possible to evaluate the dopaminergic nervous system.SOLUTION: The present invention provides a radioactive labeled compound represented by formula (1) or salt thereof [Ris H or an optionally substituted C1-6 straight-chain/branched alkyl group; Rand Rindependently represent H, a C1-6 straight-chain/branched alkyl carbonyl group or the like; and Ris -CH, -CFH, or -CFF]. |
