Ocimene

Ocimene exists as several isomers, of which (E)-β-ocimene (3,7-dimethyl-1,3,7-octatriene; C₁₀H₁₆) is the most biologically relevant in cannabis. It contributes sweet, herbaceous, slightly woody aromas and is found in mint, parsley, orchids, and basil. Plants release ocimene as a volatile signal in response to herbivory, suggesting an ecological defensive role. Reported bioactivities — antifungal, antiviral in vitro, and mild anti-inflammatory effects — come chiefly from essential-oil studies rather than cannabis-specific research. Ocimene concentrations in cannabis are typically modest (< 0.5% of the terpene fraction). Evidence level: in vitro essential-oil studies; no human data. → See also: Terpene.