| Patents for C07J 67 - Steroids in which the cyclopenta[a]hydrophenanthrene skeleton has been modified by expansion of two rings, each by one atom (2) | |
|---|---|
| 08/2013 | |
| 08/14/2013 | CN103242416A Seco-friedelolactone triterpenoid and preparation method as well as application thereof |
| 04/1982 | |
| 04/21/1982 | EP0049783A1 D-homo corticoids, their preparation and utilization |