Glucosides flavone

Flavaspidic acids Flavaspidin Flavocommelitin Flavon glucoside Flavone... 

Isoorientin (= Luteolin 6-C-glucoside) (flavone C-glycoside) Polygonum orientate (Polygonaceae) ACE (48% inhibition at 736 pM) [78]... 

Phloroglucinol (42) is a colorless and odorless solid which is only spariagly soluble ia cold water (82). It was discovered ia 1855 ia the hydrolysis products of the glucoside phloretia, which was obtained from the bark of fmit trees. Phlorogluciaol occurs ia many other natural products ia the form of derivatives such as flavones, catechins, coumaria derivatives, anthocyanidins, xanthins, and glucosides. 

Phlomis consists of about 100 species, a dozen of which occur in Mediterranean Europe (Mabberley, 1997, p. 549). The study of interest here involves a study of the flavonoids of R lychnitys L., a small plant native to Mediterranean Spain (Tomas et ah, 1986). Those workers identified the common flavones apigenin, luteolin, and luteolin 3 -methyl ether (chrysoeriol) 7-0-glucosides and their respective /7-coumaroyl derivatives. A brief review of the literature revealed that Mediterranean species of Phlomis are characterized by the presence of the flavone methyl ether, whereas continental species appear to lack 0-methylated flavones. Species from India have been reported to lack flavones but accumulate flavonols. The suggestion was made that accumulation of flavonols represents an ancestral feature of the genus. 

Inagaki I, Sakushima A, Sueo N, Sansei H. Flavones and flavone glucosides from the leaves of Trachebspermum asiaticum. Phytochemistry 1973 12 1498. 

Compounds 1 = 4-hydroxycoumarin 2 = umbelliferon 3 = 4-methyl-esculetin 4 = isopimpinellin 5 = esculin 6 = flavone 7 = a-naphtoflavone 8 = kaempferol 9 = quercetin 10 = isoquercitrin 11 = robinetin 12 = robinin 13 = myricetin 14 = luteolin 7-O-glucoside 15 = rutin 16 = hes-peretin 17 = hespiridin 18 = naringin 19 = pelargonin chloride 20 = polargonin chloride 21 = malvin chloride. 

S.M. Boue, C.H. Carter-Wientjes, B.Y. Shih and T.E. Cleveland, Identification of flavone aglycones and glucosides in soybean pods by liquid chromatography-tandem mass spectrometry. J. ChromatogrA 991 (2003) 61-68. 

Flavone, 4 -hydroxy Fr ° Fraxiresinol-l-P-D-glucoside, (+) Bk31 Fraxiresinol-l-O-P-d-glucoside, ( + ) Bk... 

Damn, A.G. et al., Two acylated flavone glucosides from Andrographis serpyllifolia. Phytochemistry, 52, 147, 1999. 

The Citrus enzyme catalyzes 2"-0-rhamnosylation of the 7-O-glucoside of flavanones and flavones but not flavonols. 

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