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Flavonoids from Phlomis tuberosa
The epigeal part of
Phlomis tuberosa L. Sp. Pl. has yielded two flavonoid glycosides, which have been characterized as luteolin... -
Flavonoid components of propolis
The following flavonoids have been isolated from propolis and identified: acacetin (I), 7,4′-dimethoxyflavone (II), kaempferide (III), rhamnocitrin...
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Use of sephadex in the analysis of some flavonoids
The conditions of gel filtration, through Sephadex of 14 different flavonoids have been studied. It has been shown that the structure of the...
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Structures of flavone and flavonol glycosides
Literature information on the structures of O-glycosides of flavones and flavonols has been generalized. Using the methods of combinatorial...
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Ultraviolet absorption of flavonoids IV. Protonation constants of some monohydroxy flavones
1. The protonation constants of flavone, 3-hydroxyflavone and its methyl ether, and 7-, 5-, and 4′-hydroxyflavones have been determined by a...
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Ultraviolet absorption of flavonoids II. Ionization constants of 7- and 4′-hydroxy derivatives of flavone and flavonol
1. The ionization constants of the 7-, 4′-, and 3-hydroxy groups in mono-and dihydroxyflavones have been determined by the spectrophotometric method.
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The NMR Spectra of Flavonoids
NMR spectra are presented in order of increasing oxidation and substitution of the flavonoid nucleus for flavones, flavonols, isoflavones,... -
The Determination and Interpretation of NMR Spectra of Flavonoids
The application of nuclear magnetic resonance (NMR) spectroscopy to the structure analysis of flavonoids is now well established. Many flavonoid...