Chemical Constituents of the Essential Oils of Origanum syriacum and Stachys aegyptiaca

AbstractThe Essential Leaf Oils Of Origanum Syriacum Var. Aegyptiacum and Stachys Aegyptiaca (Lamiaceae), Were Prepared By Hydrodistillation and Studied By Cgc and Gc-Ms. Among The 28 Compounds Identified In The Oil Of Origanum, Up To 83% Consists Of The Antiseptic and Flavoring Agent Carvacrol. In Addition, Carvacrol Methyl Ether and Carvacryl Acetate Are Present In Minute Amounts. The Monoterpene Hydrocarbon Fraction Accounts For Nearly 12% Of The Oil Of Which P-Cymene, γ-Terpinene, Myrceneand A-Thujene Are The Major Components. The Sesquiterpene Compounds and The Monoterpene Alcohols Occur In Rather Insignificant Concentrations.The Oil Of Stachys Aegyptiaca Consists Mainly Of 14 Monoterpene Hydrocarbons (75%), 4 Oxygenated Monoterpenes (1.1%) and 7 Sesquiterpene Hydrocarbons (17%). The Dominant Compound Is Ot-Pinene.