Phenolic constituents of Knautia arvensis aerial parts.
A new C-6 flavone glycoside (6), together with seven known compounds, cryptochlorogenic acid (1), chlorogenic acid (2), 2-O-trans-caffeoylhydrocitric acid (3), isovitexin 7-beta-D-glucopyranoside (4), 7,4'-dihydroxy-5-methoxyflavone-6-C-beta-D-glucopyranoside (5), 3,5-O-dicaffeoylquinic acid (7) and 4,5-O-dicaffeoylquinic acid (8), were isolated from the aerial parts of Knautia arvensis. Their structures were elucidated by extensive spectroscopic methods including 1D- (1H, 13C and TOCSY) and 2D-NMR (DQF-COSY, HSQC, HMBC) experiments, as well as ESIMS analysis. Compounds 1, 3-5 and 8 are reported for the first time in Knautia arvensis.
Department of Biochemistry, Institute of Soil Science and Plant Cultivation, State Research Institute, ul. Czartoryskich 8, 24-100 Pulawy, Poland.
Jaroslaw
J
Moldoch
Barbara
B
Szajwaj
Milena
M
Masullo
Lukasz
L
Pecio
Wieslaw
W
Oleszek
Sonia
S
Piacente
Anna
A
Stochmal
D002726:Chlorogenic Acid / Q000302:isolation & purification; D049917:Dipsacaceae / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D035263:Flowering Tops / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D011801:Quinic Acid / Q000031:analogs & derivatives / Q000302:isolation & purification
D047309:Flavones; D006027:Glycosides; C472707:caffeoylquinic acid; D011801:Quinic Acid; D002726:Chlorogenic Acid