A compound of the formula (I): ##STR1## wherein R.sup.1 is an optionally protected carboxy(lower)alkyl, R.sup.2 is a hydrogen, an optionally substituted aryl or a carboxy, X is a bond, --0--, --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 5.alpha.-reductase inhibitor and effective against testosterone 5.alpha.-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 other hyperandrogenisms.
式(I)的化合物:##
STR1##其中R.sup.1是一个可选择保护的羧基(较低)烷基,R.sup.2是
氢,可选择取代的芳基或羧基,X是键,-0-,-NH-或
环烷基,Y是一种可以被
氧原子、
烯烃基或
烯二
烯基中断的烷基,或其药用盐。本发明的化合物可用作
睾酮5α-还原酶
抑制剂,有效对抗
睾酮5α-还原酶介导的疾病,如前列腺增生、前列腺癌、
脱发、多毛症(例如女性多毛症)、雄激素性
脱发(或男性型秃头)、痤疮(例如痤疮、粉刺)和其他高雄激素症。