Planta Medica 1985-Oct
Highly Methylated 6-Hydroxyflavones and Other Flavonoids from Thymus piperella.
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From the aerial parts of THYMUS PIPERELLA, the free flavone aglycones 5,6-dihydroxy-7,8,4'-trimethoxyflavone ( 1), 5,6-dihydroxy-7,8,3',4'-tetramethoxyflavone ( 2), 5,6-dihydroxy-7,3',4'-trimethoxyflavone ( 3), ladanein ( 4) (5,6-dihydroxy-7,4'-dimethoxy-flavone), 5-hydroxy-7,4'-dimethoxyflavone ( 5) and apigenin ( 6), the flavanones naringenin ( 7) and eriodictyol ( 8), and the flavone glycosides vicenin-2 ( 9), apigenin-7- O-beta- D-glucoside (10) and luteolin-7- O-beta- D-glucoside ( 11), have been isolated and identified. This is the first time that 5,6-dihydroxy-7,8,4'-trimethoxyflavone has been found as a natural product.
