C CHEMISTRY; METALLURGY
C07 ORGANIC CHEMISTRY
C07D HETEROCYCLIC COMPOUNDS
263/00 Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
C07D263/02 not condensed with other rings
C07D263/08 having one double bond between ring members or between a ring member and a non-ring member