Abstract

The proper use of medicinal plants requires the accurate identification of the compounds in them. Due to proper climatic conditions and other factors of geographical properties, many plants are found in many regions of Iran, most of which have different properties. Essential oils of most species of yarrow are used in the health and medicinal industries. Yarrow is a plant that is most commonly found in the northwestern and northeastern of Iran, Tehran and its surroundings. In terms of medicine, this plant is very valuabl , which is collected and dried in the middle of June from the Tehran-Qom-Hassan Abad highways, whose flower, leaves, and stems were used for taking essence in Clevenger's decoction method, and then had investigated their chemical compound by analyzing GC/MS. The aim of this study was to evaluate the chemical compounds in the essential oil of Achillea Tenuifolia in its flower, leaf, and stem. The results of this study showed that the main compound in the flower include P-cymene 5%, Camphor 9%, 1-Terpinol 8.3%, Germacrene D 11.2%, which is humoring the pain, anti-scabies, and anti-spout. The major compound was in the leaf of 1,8-Cineol 8%, Spathulenol 12/0 %, N-octan 4%, and Camphor 5/1% and major compound in the stem include N-octane 35/1%, 3-methyl-heptane 17%, n-Decane 15% and Spathulenol 5 %‎.