Two methoxylated flavone glycosides were identified as the novel querc
etin 3,3'-dimethyl ether 7-O-alpha-L-rhamnopyranosyl-(1 --> 6)-beta-D-
glucopyranoside and the known quercetin 3,3'-dimethyl ether 7-O-beta-D
-glucopyranoside from the roots of Bidens pilosa. (C) 1998 Elsevier Sc
ience Ltd. All rights reserved.