Popis: |
External lipophilic methylated flavonoids have been extracted from dried leaves of Mentha aquatica, M. spicata, M. x piperita and M. citrata. After separation and purification, twenty flavonoids have been identified by means of spectrometric methods (UV, EIMS, 1H NMR). The flavonoid patterns of these species and hybrid support the view that M. x piperita may be a hybrid of M. aquatica and M. spicata while a linalool-producing sample of M. citrata may be considered a variety of M. aquatica. Cytological data agree with the observed biochemical results. |