Kaempferol 7,4 -dimethyl ether

Kaempferol 3,4 -dimethyl ether 7-glucoside Asplenium platyneuron Oakes 219 ... 

Additional information on chemical variation within this species came from studies of exudate and internal (vacuolar) pigments based on broader collections of the fern (Star et al., 1975a, b). Exudate flavonoids, identified from specimens representing the range of the species, were identified as ceroptene [221], the C-methylflavonol pityrogrammin [222], and two derivatives of kaempferol, the 4 -methyl ether [223] and the 7,4 -dimethyl ether [224] (see Fig. 2.69 for stmctures 221-224). 

Acetyl(4"-a-methylsinapoylneohesperido-side)] Kaempferol 3,5-dimethyl ether Aerva tomentosa Amaranthaceae 288... 

Kaempferol 3,7-dimethyl ether 4 -Glucoside Lantana camara leaves Verbenaceae 290... 

Kaempferol 7,4 -dimethyl ether 3-Glucoside Gymnotheca involucrata Saururaceae 291... 

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. 

One new and three known flavonol glycosides were obtained from the aerial parts of Phlomis spectabilis [84], The new glycoside was 3-0-[6 -(E)-p-coumaroyl]-p-D-glucopyranoside of kaempferol 7,4 -dimethyl ether (180). The others were tiliroside (181), kaempferol-7,4 -dimethyl ether 3-glucoside (182) and astragalin (127). 

Izalpinin dimethyl ether. 3,5,7-Trimethoxyflavone, 1330 Kaempferide trimethyl ether. 3,5,7,4 -Tetramethoxyflavone, 1330 Kaempferol. 3,5,7,4 -Tetrahydroxyflavone, 1374 Kaempferol tetramethyl ether. 3,5,7,4 -Tetramethoxyflavone, 1330 Kanugin. 3,7,3 -Trimethoxy-4, 5 -methylenedioxyflavone, 1324 Kupferbronze. Copper bronze, 1539... 

Dihydroxy-3,7-dimethoxy-flavone (Kaempferol 3,7-dimethyl ether = Kumatakenin) (185) 123 ... 

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