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    The essential oils of Grindelia squarrosa (Pursh) Dunal and G. hirsutula Hook. & Am. cultivated in Romania were isolated by hydrodistillation. The essential oils were analyzed by a combination of GC-FID and GC-MS. The identification of the constituents was achieved from their retention indices and comparison of their MS data with computer library database and literature data. The fifty-six identified constituents accounted for 72.1-81.3% of the oils. The oils were found to contain a-pinene, beta-pinene, limonene, borneol, bornyl acetate and germacrene D as main constituents. The oils obtained from the two species showed small differences in chemical composition. However, menthol, menthone and pulegone were detected only in the essential oil of G. hirsutula.


    Katalin Veres, Orsolya Roza, Eszter Laczkó-Zöld, Judit Hohmann. Chemical composition of essential oils of Grindelia squarrosa and G. hirsutula. Natural product communications. 2014 Apr;9(4):573-4

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    PMID: 24868887

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