Compound represented by formula (1) or a pharmaceutically acceptable solvate thereof, usefull for treating or preventing Paget's disease of bone, hypercalcmia, osteoporosis or asthma. (1) R1 represents a C1-C6alkyl group or C7-C15 aralkyl group (the aromatic ring of which can be substituted by a C1-C8 alkyl group, C1-C6 alkoxy group, a hydroxyl group, a halogenatom or a trifluoromethyl group), R2 represents a C1-C6 alkyl group, and R3 represents a C1-C6 alkyl or alkoxy group, which can be substituted with a hydroxyl group.
由式(1)代表的化合物或其药学上可接受的溶液,可用于治疗或预防骨的 Paget 病、高
钙血症、骨质疏松症或哮喘。(1) R1 代表 C1-C6 烷基或 C7-C15 芳烷基(其芳香环可被 C1-C8 烷基、C1-C6 烷
氧基、羟基、卤原子或三
氟甲基取代),R2 代表 C1-C6 烷基,R3 代表 C1-C6 烷基或烷
氧基,可被羟基取代。