abstract |
Formula (I) having PDE9 inhibitory activity and useful as a therapeutic agent for urination disordersn n n n n n n n In the formula, R 1 is optionally substituted with 1 to 3 substituents selected from a halogen atom, a C 1-6 alkyl group, a C 1-6 haloalkyl group containing 1 to 6 halogen atoms and a C 1-6 alkoxy group A phenyl group or aromatic heterocyclic group which may be substituted; n is an integer of 1 to 3,n n n A quinazoline derivative or a salt thereof is shown. |