Four new flavonol 7-O-glycosides 1-4 and a new chalcone ester glycosid
e 5 have been isolated from the leaves of Bidens leucantha along with
four known chalcone ester glycosides 6-9. Their structures were elucid
ated using a combination of spectroscopic techniques. The in vitro ant
i-HIV activity of all the compounds was tested as part of our screenin
g of potential anti-AIDS agents from medicinal plants. Although none o
f the flavonol glycosides was active, a moderate inhibitory effect on
viral replication was exerted by chalcone ester glycoside 9.