A compound or pharmacologically acceptable salt thereof represented by the formula (I) has PDE9 inhibitory action, so that the intracerebral cGMP concentration is anticipated to be elevated. The PDE9 inhibitory action and the increase in cGMP lead to the improvement of learning and memory behaviors, and the compound (I) has a potential use of a therapeutic agent for cognitive dysfunctions in Alzheimer's disease.
wherein R1 is a hydrogen atom; R2 is an aromatic ring group, etc.; R3 is a hydrogen atom, etc; R4 is a hydrogen atom; R5 is an oxepanyl group, etc.; R6 is a hydrogen atom.
Provided are a novel compound having a superior inhibitory action on KAT-II, a production method thereof, use thereof, and a pharmaceutical composition containing the aforementioned compound and the like.
A compound represented by the formula (I) or a pharmacologically acceptable salt thereof.
wherein each symbol is as defined in the DESCRIPTION.
Provided are a novel compound having a superior inhibitory action on KAT-II, a production method thereof, use thereof, and a pharmaceutical composition containing the aforementioned compound and the like.
A compound represented by the formula (I) or a pharmacologically acceptable salt thereof.
wherein each symbol is as defined in the DESCRIPTION.