| abstract |
Compounds represented by formula (I) and pharmaceutically acceptable salts thereof have excellent sodium channel inhibitory action and are useful as therapeutic agents and analgesics for various kinds of neuralgia, neuropathy, epilepsy, insomnia, premature ejaculation and the like. n n n n n n n n n n wherein Q represents ethylene, etc., R 1 , R 2 and R 3 represent hydrogen, etc., X 1 represents C 1-6 alkylene, etc., X 2 represents C 1-6 alkylene, etc., A 1 represents a 5- to 6-membered heterocyclic group, etc., and A 2 represents C 6-14 aryl, etc. |