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CRYSTAL PHARMA, S.A.
| CRYSTAL PHARMA, S.A. Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20110144363 | PROCESS FOR OBTAINING 17-SPIROLACTONES IN STERIODS - The invention relates to processes for obtaining steroids with a spirolactone group in position 17, particularly to industrially obtaining 6β,7β; 15β,16β-dimethylene-3-oxo-17α-pregn-4-ene-21,17-carbolactone, commonly known as Drospirenone, as well as to intermediates useful in said process. | 06-16-2011 |
| 20110118488 | PROCESS FOR OBTAINING 6-ALKYLIDENANDROST-1, 4-DIENE-3-ONE - 6-alkylidenandrost-1,4-dien-3-ones of general formula (I), wherein R is H o alkyl; R | 05-19-2011 |