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    Essential Oil Composition of Two Endemic Centaurea Species From Turkey, Centaurea Mucronifera and Centaurea Chrysantha, Collected in the Same Habitat
    (Pergamon-Elsevier Science Ltd, 2003) Dural, Hüseyin; Bağcı, Yavuz; Ertuğrul, Kuddusi; Demirelma, Hakkı; Flamini, Guido; Cioni, Pier Luigi; Morelli, Ivano
    The essential oils of two endemic Centaurea species from Turkey, C. mucronifera and C. chrysantha, collected in the same habitat, have been studied. The main compounds of the former were germacrene D (29.3%), beta-eudesmol (17.4%) and beta-caryophyllene (7.3%), while in the latter germacrene D (27.4%), caryophyllene oxide (9.5%) and bicyclogermacrene (5.4%) were detected among its major constituents. The two species produced many similar compounds in their essential oils that could be justified by the similar ecological conditions of their habitat, but also many differences were found that could confirm their taxonomic separation. (C) 2003 Elsevier Ltd. All rights reserved.
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    Flavonoid Glycosides From Centaurea Pseudoscabiosa Subsp Pseudoscabiosa From Turkey
    (Pergamon-Elsevier Science Ltd, 2002) Flamini, Guido; Pardini, Maria; Morelli, Ivano; Ertuğrul, Kuddisi; Dural, Hüseyin; Bağcı, Yavuz; Kargıoğlu, Mustafa
    Three flavonoid glycosides were isolated and characterized, together with a further 13 substances belonging to various classes of compounds, in particular two phenolic acids, a coumarin, a sugar and nine flavonoids from the flowered aerial parts of Centaurea pseudoscabiosa subsp. pseudoscabiosa Boiss. et Buhse (Asteraceae). Some considerations about their evolutionary meaning are provided.