Novel heterocyclic compound

摘要

A drug having a high affinity for benzodiazepine omega₃ receptors and showing curative and preventive effects for anxiety and depression, which comprises as the active ingredient, for example, a compound of the formula (1): wherein R¹ and R² are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc., R³ and R⁴ are independently a hydrogen atom, an optionally substituted alkyl group, etc., R⁵, R⁶, R⁷ and R⁸ are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc., X is an oxygen atom, a sulfur atom, NR¹⁰, etc. (in which R¹⁰ is a hydrogen atom, an optionally substituted alkyl group, etc.)