Flavonoids of Lonchocarpus specious

Abstract

Lonchocarpus speciosus Bolus (Fabiaceae, Papilinoideae) was

previously examined and exhibited 5 flavonoids, namely lonchocarpin,

chalcone, 5,7-dihydroxyaurone. taxifolin, astilbin, fustin and

fustin 3-O glucoside. The stem, leaf and bark showed marked

insecticidal effects against Drosophila melonogaster Meig flies (1).

We report here 7 known and one new flavonoid, namely apigenin

6-C[β-D glucopyranosyl (1 → 6) O-β-D-glucoside] 8-C[β-D-glucopyranosyl

(1 → 6) O-β-D-glucoside]. The known compounds

are apigenin 7-O neohesperidoside, apigenin 7-O glucoside,

vicenin-2, luteolin 7-O glucoside, kaempferol, ferulic and caffeic

acids. Extracts of different polarities were examined for fungicidal

activities.