| abstract |
(57) [Problem] To provide a low molecular compound useful for treatment / prevention of various bone diseases or neurological diseases. SOLUTION: The formula: [Wherein, R 1 represents a lower alkyl group, R 2 represents a cyano group or a carbamoyl group, A represents an aromatic 5-membered ring which may be substituted by a (lower alkyl group or a phenyl group), and n Represents an integer of 3 to 10. Or a pharmaceutically acceptable salt thereof. |