| 摘要 |
The present invention aims to provide a drug for the treatment or prophylaxis of pathology in general in which SNS is involved, specifically diseases such as neuropathic pain, nociceptive pain, dysuria, multiple sclerosis and the like. The present invention provides a compound represented by the following formula (1) or a pharmaceutically acceptable salt thereof wherein R 1 is a hydrogen atom or the like, L is a single bond, -O- or the like, R 2 is a phenyl group or the like, X is a carbon atom or a nitrogen atom, and R 3 , R 4 , R 5a , R 5b , R 6 and R 7 are each independently a substituted or unsubstituted alkyl group or the like:
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