| 摘要 |
<p>Agents having an oestrogenic activity, containing a compound of general formula (I), where R1 represents a hydrogen atom, a methyl group or an acyl group with 1 to 12 carbon atoms, R2 represents a hydrogen atom or an acyl group with 1 to 12 carbon atoms, R3 represents a hydrogen atom or a methyl group, (a) represents a single or double C-C- bond. These new compounds are suited for making preparations intended for contraception and treating oestrogen deficiency phenomena.</p> |
