The invention provides a compound of the formula (I): wherein R is methyl, ethyl, propyl, isopropyl, butyl, pentyl, neo-pentyl or cyclohexyl, or a salt or solvate thereof. These compounds are selective GABAC receptor antagonists. The invention also provides pharmaceutical compositions comprising a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof. The invention also provides methods of enhancing the cognitive activity of an animal and methods of stimulating memory capacity in an animal, comprising the step of administering to the animal an effective amount of a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof.
本发明提供了一种公式(I)的化合物:其中R是甲基、乙基、丙基、异丙基、丁基、戊基、新戊基或环己基,或者是其盐或溶剂化物。这些化合物是选择性的
GABAC受体拮抗剂。本发明还提供了包含公式(I)化合物或其药用可接受的盐或溶剂化物的药物组合物。本发明还提供了增强动物认知活动的方法和刺激动物记忆容量的方法,包括向动物投给有效量的公式(I)化合物或其药用可接受的盐或溶剂化物。