The invention discloses quinazoline derivatives or salts thereof, which possess PDE9-inhibiting activity and are useful as treating agents of dysuria and the like, the derivatives being represented by the formula (I)
in the formula, R
1
stands for phenyl or aromatic heterocyclic group which are optionally substituted with 1-3 substituents selected from halogen, C
1-6
alkyl, C
1-6
haloalkyl containing 1-6 halogen atoms and C
1-6
alkoxy; and n is an integer of 1-3.
本发明公开了
喹唑啉衍
生物或其盐,它们具有PDE9抑制活性,可用作治疗排尿困难等疾病的药物,其中衍
生物由式(I)表示,在该式中,R1代表
苯基或芳香杂环基,可选地被1-3个取代基所取代,所述取代基选自卤素、C1-6烷基、含有1-6个卤素原子的C1-6卤代烷基和C1-6烷
氧基;n为1-3的整数。