American Journal of Essential Oil and Natural Products


Volume 2, Issue 1

Composition of the essential oil and the hydrosol of the roots of Ligusticum porteri

Author(s): Guy Collin, Hélène Gagnon, Alexis St-Gelais, Maxim Turcotte

Abstract: Monoterpenes and monoterpenes derivatives constitute the main part of the essential oil of the roots of Ligusticum porteri. Sabinene (9.0-15.5%) and p-cymene (6.5-9.7%) are the main compounds of monoterpene hydrocarbons along with a rather unusual compound: viridene (19.4%).  trans-Sabinyl acetate (22.6%) is by far the most important oxygenated monoterpene. Several compounds are observed among the sesquiterpene group with percentage generally lower than 1%. The most important compound in one sample is thapsadiene (0.6%) and in the second sample is a-selinene (0.7%). Finally, several recently described oxygenated sesquiterpenoids are among the minor compounds. The most important are: a-prethapsenol (1.7-3.3%), a-preisothapsenol (0.8-1.6%) and β-isoligustigrenol (0.6-1.3%) along with (Z)-ligustilide (0.7%). The hydrosol does not show the presence of hydrocarbon compounds.  However, oxygenated compounds such as terpinen-4-ol (16.5 mg/L), including some compounds not observed in the oil such as hexanal (2.5 mg/L), furfural (2.0 mg/L) and p-cymen-8ol (2.5 mg/L), are observed in the hydrosol.

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