| 摘要 |
<p>The invention relates to processes for obtaining steroids with a spirolactone group in position 17, particularly to industrially obtaining 6²,7²; 15², 16²-dimethylene-3-oxo-17±-pregn-4-ene-21,17-carbolactone, commonly known as Drospirenone, as well as to intermediates useful in said process.</p> |
