Constituents of Essential Oil Isolated from the Dried Flower and Leaf ofAgastache rugosa(Fisch. et Mey) from Xinjiang, in China

Abstract This article deal with the detailed pharmacognostic evaluation of the crude drug A. rugosa. The essential oils isolated from dried flower and leaf of A. rugosa from Xinjiang, in China, were extracted by the method of hydrodistillation and the chemical compositions of these oils have been investigated by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The yields of essential oils from the dried flower and leaf based on the dry weight of the plant were 0.29 % and 0.57 % (w/w), respectively. The flower oil was revealed the presence of 21 components, representing 99.78 % of the total oil. The major compounds of the flower oil were oxygenated terpenes (35.4 %), estragole (29.5 %), p-Menthan-3-one (19.2 %), and monoterpenes (8.8 %). Twenty-six components accounting for 99.62 % of constituents of leaf oil were identified, and the main compounds of the oil were p-Menthan-3-one (48.8 %), estragole (20.8 %), monoterpenes (8.3 %), and oxygenated terpenes (5.6 %). Oxygenated terpenes were the main group of the compounds in the flower oil and p-Menthan-3-one was the main group of the compounds in the leaf oil.