Abstract
Two new acetyl C-glucoside flavonoids, 8-C-beta-D-(2"-O-acetyl)glucofuranosylapigenin and 3"-O-acetylvitexin, along with four known C-glucoside flavonoids, vitexin, 6"-O-acetylvitexin, 2-O-acetylvitexin, and 2"-O-rhamnosylvitexin were isolated from the leaves of Crataegus pinnatifida Bge. var. major N.E.Br. Their structures were elucidated by spectroscopic means and chemical evidence.
MeSH terms
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China
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Crataegus / chemistry*
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Flavonoids / chemistry
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Flavonoids / isolation & purification*
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Glucosides / chemistry
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Glucosides / isolation & purification*
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Plant Extracts / metabolism
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Plants, Medicinal / chemistry*
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Spectrometry, Mass, Electrospray Ionization
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Spectrometry, Mass, Fast Atom Bombardment
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Spectrophotometry, Infrared
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Spectrophotometry, Ultraviolet
Substances
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Flavonoids
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Glucosides
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Plant Extracts
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crataegus extract