The purpose of this invention is to provide a treating or prophylactic agent for SNS-related whole pathology, specifically for the disorders of neuropathic pain, nociceptive pain, urinary disturbance, or multiple sclerosis and the like.This invention provides a compound represented by the following formula (1) or pharmaceutically acceptable salt thereof (wherein R1is a hydrogen atom and the like, L is a single bond, -O- and the like, R2is a phenyl and the like, X is a carbon atom or nitrogen atom, R3, R4, R5a, R5b, R6and R7is individually a substituted or non-substituted alkyl and the like.)本發明之目的係提供對於SNS相關之整體病理狀態，具體而言係神經因性疼痛、感覺接受性疼痛、排尿障礙或多發性硬化症等疾患之治療藥或預防藥。本發明係提供下述式(1)所示化合物或其藥學上容許之鹽(式中，R1為氫原子等，L為單鍵、-O-等，R2為苯基等，X為碳原子或氮原子，R3、R4、R5a、R5b、R6及R7各自為經取代或未經取代之烷基等)。
