Summary
Hyperosid (quercetin-3-galactoside) was isolated from the bracts of the dove tree and identified by paper chromatography, melting point determinations, UV- and IR-spectroscopy. The yield of crystalline hyperosid was approximately 1% of the dry weight. It is the main glycoside of the bracts and also appears in the green leaves, but is absent in the bark, wood and fruit. Quercitrin (quercetin-3-rhamnoside) is also present, in minor amount. No other flavonol glycoside could be detected. The analytical results are discussed in relation to their possible taxonomic and physiological implications.
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Rast, D. Hyperosid, das Hauptflavonolglykosid von Davidia involucrata Baill.. Planta 80, 154–158 (1968). https://doi.org/10.1007/BF00385591
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DOI: https://doi.org/10.1007/BF00385591