A compound of the formula
wherein R1 is hydrogen or hydroxy, R2 and R3 are independently hydrogen or lower alkyl and Y is carboxyl or a group convertible to carboxyl is effective for prevention or treatment of osteoporosis.
式中的化合物
其中 R1 为
氢或羟基,R2 和 R3 独立地为
氢或低级烷基,Y 为羧基或可转化为羧基的基团,可有效预防或治疗骨质疏松症。