Quality and quantity Comparison of clustered Sa oregano essence(Nepeta racemose ) at different stages of growth

Clustered Oregano Sai with the scientific name, Nepeta racemosa L. from Spearmint family, is a plant like a grass, and one of the most important medicinal plants in the world and our country that has significant amounts of secondary metabolites and is especially essence. Useful material of this plant, is using in the medicine field and pharmaceutical industry and cosmetics and hygienic field.(khalad Barin and Islam zade, 1380). The purpose of this study is to analyze and study the essence oil of clustered Sai Oregano plant at different growth stages. clustered Sa oregano essence plant (Napata racemosa) from mid-July to early of August 1393 during phase before flowering, After flowering and fruiting phase in Haraz Road area after the Holy Hashem ( imam zade) Plur three ways toward Lar, is collected After identification. After collecting and drying, essence oils of samples are taken by using distillation and Clevenger apparatus. Clustered Sa oregano essence, monoterpene component has highest percentage of plant clustered Sa oregano essence, in all 5 stages. In the meantime, the two combined composition of Nptalactones and 1,8-cineole were higher than the other compounds. In many of the studies on the chemical composition of essences that are exist in the resources; Monoterpenes compounds constitute the most of their component (33). And in some of them Npta monoterpene lactones and 1,8-cineole are main ingredients of essence.