*4.8. Thujene*

Like many monoterpenes, thujene can be found in a variety of plant-derived essential oils such as eucalyptus [132], frankincense [133], and dill [134]. Similar to humulene, α-thujene produces a woody, spicy aroma [135]. Researchers have tested the bioactivity of essential oils that consist of high levels of thujene, such as the essential oil of *Boswellia serrata*, which has been reported to consist of 61.36% α-thujene [136]. Investigations exploring the bioactivity of essential oils containing α-thujene sugges<sup>t</sup> antioxidant [137], anti-inflammatory [138], anti-microbial [139], and analgesic [140] properties. Although these

studies provide insight into the bioactivity of essential oils containing this compound, more research is required to delineate the therapeutic properties of isolated α-thujene.
