A heterocyclic compound active neurological, including the two fused six-membered ring having a hydroxy group at the 8-position as well as the carboxy group nitrogen atom in positions 1 and 3, the 4-position, one of the rings in the aromatic certain compounds. As a veterinary drug or medicament and methods of preparing these compounds, and their use for the treatment of neurodegenerative conditions such as Alzheimers disease for the treatment of neurological conditions, more specifically in particular.1位および3位に窒素原子、4位にカルボキシ基ならびに8位にヒドロキシ基を有する二融合6員環を含む神経学的に活性な複素環式化合物であって、一方の環が芳香性である化合物。これらの化合物の調製方法および薬剤または獣医用薬剤としての、特に神経学的状態の治療のための、より具体的にはアルツハイマー病などの神経変性状態の治療のためのその使用方法。
