| 摘要 |
<p>Compounds, useful as progestational agents, of the formula …<CHEM>… wherein R1 is:… (a) hydrogen;… (b) H2; or… (c) COOR2;… wherein R2 is:… (a) hydrogen… (b) alkyl of one to six carbon atoms, inclusive; or… (c) aralalkyl of four to thirteen carbon atoms, inclusive;… wherein R3 is:… (a) oxo;… (b) = NOH; or… (c) -OR4;… (d) -OC=O(R4)… wherein R4 is:… (a) hydrogen; or… (b) alkyl of one to six carbon atoms, inclusive;… with the proviso that R1 may not be hydrogen or H2 when R3 is oxo or when R3 is -O-Acetyl, a process for preparing them, and pharmaceutical compositions containing said compounds.</p> |
