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An essential oil was extracted from the traditional Tibetan medicine of Pyrethrum tatsienense by steam distillation method. The chemical components of the essential oil were analyzed by gas chromatography-mass spectrometry(GC/MS) and 30 compounds were identified, which account for 67.5 % of the total essential oil from the flowers of P. tatsienense.  相似文献   
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The essential oils from flowers of Rosa chinensis were obtained from Sichuan, Anhui and Shanxi provinces, which were extracted by steam distillation method. The chemical components of the essential oils were analyzed by gas chromatography-mass spectrometry (GC/MS).  相似文献   
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