Fenchol, also called 2-fenchanol and fenchyl alcohol, is a minor terpene and an isomer of borneol that is produced by aster flowers, basil, cannabis, eucalyptus leaves, nutmeg, and wild celery (among other plant species).

Within the cannabis genome, fenchol, a somewhat rare terpene, delivers an earthy, piney aroma that may include undertones of lemon and camphor. Fenchol is a primary aroma element of basil and is principally responsible for the herb’s distinctive aroma.

Fenchol is a monoterpene, meaning that it is considerably smaller and less complex than other types of terpenes. The potential medicinal efficacy of this molecule includes support for pain reduction, antibacterial and antimicrobial effects, and antioxidant properties.