17.alpha.-Alkyl steroids of the formula ##STR1## wherein R.sub.1 is hydrogen, acyl, alkyl, alkenyl, alkyl or alkenyl interrupted by an oxygen atom, cyclopentyl, or tetrahydropyranyl, R.sub.2 is alkyl or alkenyl of 2-6 carbon atoms, X is oxygen or the grouping H(OR.sub.3) wherein R.sub.3 is hydrogen, acyl, alkyl, alkenyl, alkyl or alkenyl interrupted by an oxygen atom, cyclopentyl, or tetrahydropyranyl, upon topical application, display antiandrogenic properties and can be utilized for the treatment of acne, seborrhea, alopecia and hirsutism.
公式为##STR1##的17.alpha.-烷基类
固醇,其中R.sub.1为氢、酰基、烷基、烯基、被氧原子中断的烷基或烯基、环戊基或
四氢吡喃基,R.sub.2为2-6个碳原子的烷基或烯基,X为氧或H(OR.sub.3)基团,其中R.sub.3为氢、酰基、烷基、烯基、被氧原子中断的烷基或烯基、环戊基或
四氢吡喃基。该类
固醇在局部应用时具有抗雄激素作用,可用于治疗痤疮、皮脂溢出、脱发和多毛症。