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4 -Methoxyflavanone

Tetrahydroxy-4 -methoxyflavanone Root exudate Vida saliva R. legiiminosarum... [Pg.9]

The basic structures of flavanones, flavones, and isoflavones together with coumestrol, an intermediate in the phenylpropane metabolism, are given in Fig. 2. The 3,5,7,3 -tetrahydroxy-4 -methoxyflavanone is a nod gene inducer in Rhizo-bium leguminosarum bv. viciae the 3, 4, 5,7-tetrahydroxyflavone, in Rhizobium ineliloti and 4,7-dihydroxyisoflavone, in Bradyrhizobium japonicum. Coumestrol, an intermediate in phenylpropane metabolism, is only a weak inducer (7). [Pg.198]

Figure 2 Structures of flavonoids present in root exudates of host plants and inducing nod gene expression in rhizobia (1) as 3,5,7,3 -tetrahydroxy-4 -methoxyflavanone, inducer in Rhizohium legiiminosarum bv. viciae (2) as 3, 4, 5, 7-tetrahydroxy-flavone, inducer in Rhizohium melilotr, (3) as 4, 7-dihydroxyisoflavone, inducer in Bradyrhizohium japonicum (4) as couinestrol, intermediate in phenylpropane metabolism, weak inducer. (From Ref. 64.)... Figure 2 Structures of flavonoids present in root exudates of host plants and inducing nod gene expression in rhizobia (1) as 3,5,7,3 -tetrahydroxy-4 -methoxyflavanone, inducer in Rhizohium legiiminosarum bv. viciae (2) as 3, 4, 5, 7-tetrahydroxy-flavone, inducer in Rhizohium melilotr, (3) as 4, 7-dihydroxyisoflavone, inducer in Bradyrhizohium japonicum (4) as couinestrol, intermediate in phenylpropane metabolism, weak inducer. (From Ref. 64.)...
Tetrahydroxy-4 -methoxyflavanone 7,3 -dihydroxy-4 -methoxyflavanone 4,2, 4 -trihydroxychalcone 4,4 -dihydroxy-2 -methoxychalcone naringenin liquiritigenin 7,4 -dihydroxy-3 -methoxyflavanone 5,7,4 -trihydroxy-3 -methoxyflavanone 5,7,3 -trihydroxy-4 -methoxyflavanone... [Pg.418]

An interesting new penta-O-substituted flavanone is 8-hydroxyhesperetin (5,7,8,3 -tetrahydroxy-4 -methoxyflavanone, 20), which was produced by the fungus Aspergillus saitoi... [Pg.920]

Hesperidin (= 3, 5,7-Trihydroxy-4 -methoxyflavanone-7-rutinoside) (flavanone-O-glycoside) Hyssopus, Mentha (Lamiaceae), Citrus spp., Poncirus trifoliata (Rutaceae) ACE (23% inhibition at 300 pM) [76]... [Pg.579]

The seeds of Aframomum hanburyi K. Schum. (Zingiberaceae) are used as an antidote and ingredient in certain medicinal preparations in Cameroon [93]. From an acetone extract of the seeds of this plant, two sweet dihydroflavonols, 3-acetoxy-5,7-dihydroxy-4 -methoxyflavanone (68) and 2/ ,3/ -(+)-3-acetoxy-5,7,4 -trihydroxyflavanone (69), were isolated [93]. 3-Acetoxy-5,7-dihydroxy-4 -methoxyflavanone (68) was previously isolated from a different species, Aframomum pruinosum Gagnepain [112]. However, the sweetness intensities of these compounds were not indicated [93,112]. The previously known 2R,2>R)-dihydroquercetin 3-0-acetate (71) which was rated as 80 times sweeter than sucrose, was isolated from Tessaria dodoneifolia (Hook. Am.)... [Pg.34]

Acetoxy-5,7-dihydroxy-4 -methoxyflavanone (68) Aframomum hanburyi K. Schum. (Zingiberaceae) N.S. 93... [Pg.998]

Pisutthanan et al. (27) isolated six flavonoids out of which three were reported in this plant for the first time. They include 3,5,4 -trihydroxy-7-methoxyflavanone 5,7,3 -trihydroxy-5 -methoxyflavanone and 3,5,7-trihydroxy-4 -methoxyflavanone. Ling et al. (28) also isolated a total of eleven flavonoids from the leaf extract and identified them as eriodictyol 7,4 -dimethyl ether, quercetin 7,4 -dimethyl ether, naringenin 4 -methyl ether, kaempferol 4 -methyl ether, kaempferol 3-0-mtinoside, taxifolin 4 -methyl ether, taxifolin 7-methyl ether and quercetin 4 -methyl ether. Suksamram et al. (23) isolated the flavanones, isosakuranetin (5,7-dihydroxy-4 -methoxyflavanone), persicogenin (5,3 -dihydroxy-7,4 -dimethoxyflavanone), 5,6,7,4 -tetramethoxyflavanone and 4 -hydroxy-5,6,7-trimethoxyflavanone, the chalcones, 2 -hydroxy-4,4, 5, 6 -tetramethoxychalcone and 4,2 -dihydroxy-4, 5, 6 -trimethoxychalcone, and the flavones, acacetin (5,7-dihydroxy-4 -methoxyflavone) and luteolin (5,7,3, 4 -tetrahydroxyflavone) from the flowers. [Pg.244]

Hesperetin (3, 5,7-trihydroxy-4 -methoxyflavanone) [520-33-2] M 3023, (R,S) m 227-228 , pKEst 83-10.5 (phenolic). Crystallise it from EtOAc or ethanol. The natural 5(-) form crystallises from... [Pg.395]

Figure 6.1. Flavonoids shown to be of nutritional significance are, for the most part, derivatives of either flavone or flavanone, e.g. quercetin (3,3,4,5,7-pentahydroxyflavone), rutin (quercetin-3-rutinoside), naringenin (4,5,7-trihydroxy flavanone), hesperetin (3,5,7-tri-hydroxy-4-methoxyflavanone) and hesperidin (hesperetin-7-rutinoside)... Figure 6.1. Flavonoids shown to be of nutritional significance are, for the most part, derivatives of either flavone or flavanone, e.g. quercetin (3,3,4,5,7-pentahydroxyflavone), rutin (quercetin-3-rutinoside), naringenin (4,5,7-trihydroxy flavanone), hesperetin (3,5,7-tri-hydroxy-4-methoxyflavanone) and hesperidin (hesperetin-7-rutinoside)...
Derived semisynthetically from 3, 5,7-Tri-hydroxy-4 -methoxyflavanone. Intensely sweet, 612 times more sweet than sucrose. Permitted in EU at low cones. (=10 ppm) for certain applications, e.g. low-alcohol beer. Generally recognised as safe (GRAS) in the USA. [Pg.783]

The optical isomers of seven flavanones (flavanone, 5-methoxy-, 4 -methoxy-, 5-methoxy-, 2 - and 6-hydroxy-, 6-methoxyflavanone, pinostrobin) were resolved on a Chiralcel OD column (A = 254 nm) using a 90/10 hexane/IPA mobile phase [684]. Capacity factors ranged from 1.3 to 2.9 and a-values from 1.16 to 1.60. A 100/4 hexane/dioxane mobile phase used in conjunction with a ChiraSpher column (2 = 254 nm) resolved three sets of enantiomers (flavanone, 6-hydroxy-, and 4 -methoxyflavanone) in <25 min. [Pg.245]


See other pages where 4 -Methoxyflavanone is mentioned: [Pg.255]    [Pg.51]    [Pg.51]    [Pg.761]    [Pg.548]    [Pg.548]    [Pg.255]    [Pg.761]    [Pg.388]    [Pg.738]    [Pg.631]    [Pg.747]    [Pg.444]    [Pg.399]    [Pg.404]    [Pg.444]    [Pg.442]    [Pg.459]    [Pg.502]    [Pg.555]    [Pg.226]    [Pg.291]    [Pg.517]    [Pg.96]   
See also in sourсe #XX -- [ Pg.9 , Pg.112 ]

See also in sourсe #XX -- [ Pg.9 , Pg.112 ]




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Dihydroxy-methoxyflavanone

Hesperidin (3 ,5,7-trihydroxy-4 methoxyflavanone-7-rutinoside

Hesperidin (3 ,5,7-trihydroxy-4 methoxyflavanone-7-rutinoside effects on ACE

Trihydroxy-methoxyflavanone

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