IPC Main Group
C07J 67/00 Steroids in which the cyclopenta[a]hydrophenanthrene skeleton has been modified by expansion of two rings, each by one atom
Introduced: July 1974
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- STEROIDS
Related Keywords
HOMOSTEROIDS