Abstract
The authors have studied t elucidate the constituents of the essential oil Thymus quinquecostaus Celak.The essential oil was obtained by steam distillation of the plant's leaves and stems.The essential oil was treated with 2 N 'sodium carbonate, then with 2 N sodium hydroxide solution, and was separated into the three parts neqtral, phenolic and carboxylic acid.The resulting each part was investigated by means of golumn chromatagraphy, gas chromatography, infrared spectrum, mass spectrum, nuclear maghetic resonance spectrum and chemical method.As a result, twenty kinds of compound were detected as the c.onJs tituents of Shis essentiaj oil a-pinene, B-pinene, campht ne liinonene, p-cymene, B-caryophyllene, humulene, r-cadi nene, B-bisabolene, bernylacet, ate, 'camphor, 3rectanone, dihydrocarvone, 3-hexen-1-ol, 1-octen-3-ol, terpinen-4-ol, bornedl, thYmol, 'carv, acrol and thymolmethylether.
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