Patent classifications
C
CHEMISTRY; METALLURGY
Load children
C07
ORGANIC CHEMISTRY
Load children
C07D
HETEROCYCLIC COMPOUNDS
Load children
473/00
Heterocyclic compounds containing purine ring systems
Load children Filter patents View analytics View as hierarchy
C07D473/02
with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
Load children Filter patents View analytics View as hierarchy
C07D473/18
one oxygen and one nitrogen atom, e.g. guanine
Filter patents View analytics View as hierarchy