| 摘要 |
<p>The claims cover skin treatment agents which are characterized by the fact that as active ingredients they contain one or two 17β-methyl-18-norsteroids of the general formula (I), in which ..... represents a simple link or a double link, R1 represents a hydrogen atom or a methyl group and R2 represents, as the case may be, an alkyl group with at most six carbon atoms substituted by an alkanoyloxy group containing from 2 to 6 carbon atoms.</p> |
