PROBLEM TO BE SOLVED: To provide a compound having high affinity to an adenosine Aacceptor, and useful for treatment and/or prevention of Alzheimer disease, Parkinson disease, attention deficit hyperactivity disorder (ADHD), Huntington disease, nerve protective action, schizophrenia, uneasiness and pain or the like.SOLUTION: There is provided a compound illustrated by following formula, having high affinity to an adenosine Aacceptor, and working as an antagonist to the adenosine Aacceptor.【課題】アデノシンA2A受容体に対して高い親和性を有し、アルツハイマー病、パーキンソン病、注意欠陥多動障害(ADHD)、ハンチントン病、神経保護作用、統合失調症、不安および疼痛等の治療および/または予防に有効な化合物の提供。【解決手段】下記式にて例示される、アデノシンA2A受容体に対して高い親和性を有し、アデノシンA2A受容体のアンタゴニストとして作用する化合物。【選択図】図2