COMPOSTO, COMPOSIÇÃO FARMACÊUTICA, E, USO DE UM COMPOSTO

[Object] To provide a compound which has activity to inhibit production and/or secretion of ²-amyloid protein, and is useful for prevention and/or treatment of various diseases associated with abnormal production and/or secretion of ²-amyloid protein. [Means for Solution] A compound represented by the general formula (I): [wherein, R 1 represents a C1-C6 alkyl group which may have 1 to 6 halogen atoms as substituent groups, a C2-C6 alkenyl group which may have 1 to 6 halogen atoms as substituent groups, or a C3-C7 cycloalkyl group which may have 1 to 6 halogen atoms as substituent groups; R 2 represents a 6-membered nitrogen-containing monocyclic aromatic heterocyclic group having 1 to 3 substituent groups, or a 9- or 10-membered nitrogen-containing bicyclic heterocyclic group having 1 to 4 substituent groups; Z 1 , Z 2 and Z 3 each independently represent a hydrogen atom, a halogen atom or a cyano group; and n represents 0, 1 or 2], salts thereof, or solvates thereof.