Eight flavonol glycosides in Pyrola (pyrolaceae) |
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| Affiliation: | 1. Department of Physiology, PAMO University of Medical Sciences, Port Harcourt, Rivers State, Nigeria;2. Department of Biochemistry, PAMO University of Medical Sciences, Port Harcourt, Rivers State, Nigeria;3. Department of Physiology, College of Medical Sciences, University of Calabar, Calabar, Nigeria;4. Department of Pharmacology, PAMO University of Medical Sciences, Port Harcourt, Rivers State, Nigeria;5. Department of Pharmacology, College of Medical Sciences, University of Uyo, Nigeria |
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| Abstract: | As part of a general survey of the flavonoids of Pyrolaceae, the flavonoids of Pyrola virens and P. chlorantha were investigated. Eight flavonol glycosides based upon kaempferol, quercetin and rhamnetin were identified from each of the two species. Two of the glycosides, rhamnetin 3,3′,4′-tri-O-glucoside and rhamnetin 3-O-arabinoside-3′,4′-di-O-glucoside are previously unreported and further, represent an unusual pattern of glycosylation. The similarity of flavonoids and the presence of the unusual substitution pattern supports a conspecific status for the two taxa. |
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