PROBLEM TO BE SOLVED: To provide a compound suitable for detection of vesicular acetylcholine transporter which can be also used as a compound labeled in PET method.SOLUTION: The present invention provides a compound represented by formula (I), where R1 represents CH3, F, (CH2)n-F, NH-(CH2)n-F, O-(CH2)n-F or S-(CH2)n-F and n represents an integer of 1 to 3.COPYRIGHT: (C)2015,JPO&INPIT