[A new flavonol glycoside from Baeckea Frutescens L].
To study the chemical constituents of the traditional Chinese herb Baeckea Frutescens L., a new flavonol glycoside, named 6, 8-dimethylkaempferol-3-O-alpha-L-rhamnoside (1), together with seven known compounds: quercetin (2), quercetin-3-O-alpha-L-rhamnoside (3), myricetin (4), myricetin-3-O-alpha-L-rhamnoside (5), gallic acid (6), ursolic acid (7) and 1,3-dihydroxy-2-(2'-methoxylpropionyl)-5-methoxy-6-methylbenzene (8) were isolated by using silica gel column chromatography, polyamide column chromatography and recrytallization. Their structures were identified on the basis of physicochemical properties and spectroscopic analysis. Among them, compounds 2-7 were isolated from this plant for the first time and compound 8 was first isolated from plant.
Lu
Wen-jie
WJ
Guangxi Institute of Pharmaceutical and Medical Science, Nanning 530022, China.
Ya
Qi-kang
QK
Chen
Jia-yuan
JY
Liu
Bu-ming
BM
D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D027822:Myrtaceae / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D014050:Toluene / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification; D000097245:Ursolic Acid
D005419:Flavonoids; D044948:Flavonols; D006027:Glycosides; D044949:Kaempferols; D011794:Quercetin; D014050:Toluene; D014315:Triterpenes; D000097245:Ursolic Acid; C546235:1,3-dihydroxy-2-(2'-methoxylpropionyl)-5-methoxy-6-methylbenzene; C546234:6,8-dimethylkaempferol-3-O-alpha-L-rhamnoside; C040015:myricetin