Anti-Tubercular Flavonol Derivatives from Uvaria rufa.

Bioassay-guided chromatographic purification of the crude -methanolic extract of the Philippine medicinal plant Uvaria rufa carteri resulted in the isolation and identification of a mixture 1:1 the flavonols kaempferol (1) and quercitrin (2) on the basis of spectroscopic evidences (UV, IR, and NMR) and comparison with literature data. Microplate Alamar Blue assay showed moderately strong antitubercular activity for these flavonol derivatives.