(-) -Fenchone (Standard) is the analytical standard of (-) -Fenchone. This product is intended for research and analytical applications. (-) -Fenchone, a bicyclic monoterpene, is widely distributed in plants and found in essential oils from Foeniculum vulgare. (-) -Fenchone is oxidized to 6-endo-hydroxyfenchone, 6-exo-hydroxyfenchone and 10-hydroxyfenchone derivatives by CYP2A6 and CYP2B6 in human liver microsomes with CYP2A6 playing a more important role than CYP2B6[1].