URB694 is derived from its close analogue URB597, a well-studied FAAH inhibitor.472 Owing to its ideal brain penetration ability and plasma stability, [11C]CURB has been recently applied to rodents and humans with cannabis addiction, alcohol use disorders, borderline personalities, and psychiatric disorders.471 Kolla et al. used [11C]CURB PET/CT scans to investigate the expression level of FAAH in 16 individuals with antisocial personality disorder (ASPD). Here, FAAH is linked to alcohol abuse.