Webby, Rosemary F.; Markham, Kenneth R.. 1994 Isoswertiajaponin 2′'-O-β-arabinopyranoside and other flavone-C-glycosides from the Antarctic grass Deschampsia antarctica. Phytochemistry, 36 (5). 1323-1326. 10.1016/S0031-9422(00)89660-0
The major flavonoid constituents of the Antarctic grass, Deschampsia antarctica, are shown to be the C-glycosylflavones, isoswertiajaponin (7-O-methylorientin) 2′'-O-β-arabinopyranoside and orientin. These are accompanied by lower levels of orientin 2′'-O-arabinopyranoside, isoswertisin (7-O-methylvitexin) 2′'-O-β-arabinopyranoside, acylated derivatives, isoswertisin, isoswertiajaponin and tricin. A preliminary study suggests that the overall level of flavonoids in Deschampsia increases during the Antarctic mid-summer.
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