| abstract |
Formula (I) having a PDE9 inhibitory effect and useful as a therapeutic agent for dysuria In the formula, R 1 optionally represents a halogen atom, a C 1-6 alkyl group, a C 1-6 haloalkyl group containing 1 to 6 halogen atoms, and 1 to 3 substituents selected from a C 1-6 alkoxy group. Represents a phenyl group or an aromatic heterocyclic group which may be substituted by n; n is an integer of 1 to 3; The quinazoline derivative | guide_body or its salt shown by this is disclosed. |