| abstract |
A compound of formula (I), wherein R1 is an optionally protected carboxy(lower)alkyl, R2 is a hydrogen, an optionally substituted aryl or a carboxy, X is a bond, -O-, -NH- or a cycloalkylene, and Y is an alkylene which may be interrupted by an oxygen atom, an alkenylene or an alkadienylene, or a pharmaceutically acceptable salt thereof. The compound of the present invention is useful as a testosterone 5α-reductase inhibitor and effective against testosterone 5α-reductase-mediated diseases such as prostatism, prostatic hypertrophy, prostatic cancer, alopecia, hirsutism (e.g. female hirsutism), androgenic alopecia (or male-pattern baldness), acne (e.g. acne vulgaris, pimple), and another hyperandrogenisms. |