Patent classifications
C
CHEMISTRY; METALLURGY
Load children
C07
ORGANIC CHEMISTRY
Load children
C07J
STEROIDS
Load children
73/00
Steroids in which the cyclopenta[a]hydrophenanthrene skeleton has been modified by substitution of one or two carbon atoms by hetero atoms
Load children Filter patents View analytics View as hierarchy
C07J73/005
by nitrogen as hetero atom
Filter patents View analytics View as hierarchy