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6-Hydroxyluteolin-7-O-(1''-alpha-rhamnoside) from Vriesea sanguinolenta Cogn. and Marchal (Bromeliaceae)
1Institut für Organische Chemie der Universität, Würzburg, Germany. bringman@chemie.uni-wuerzburg.de
Phytochemistry
|May 23, 2000
Abstract:
The isolation of 6-hydroxyluteolin-7-O-(1"-alpha-rhamnoside) from the Central American epiphyte Vriesea sanguinolenta Cogn. and Marchal (Bromeliaceae) is described here. Its stereostructure was established by spectroscopic methods and an X-ray structure analysis of its hepta-O-acetyl derivative. This flavonoid glycoside had previously been reported from some Teucrium species (Labiatae), yet without sufficient physical data and spectroscopic evidence.