Isolation of quercetin-3-<i>O</i>-rutinoside from the leaves of <i>Globimetula braunii</i> (Loranthaceae) growing on <i>Terminalia catappa</i> (Combretaceae)

Abstract

Globimetula braunii is a medicinal plant that grows in tropical countries and is used in the treatment of various diseases. The plant was reported to contain several secondary metabolites that are responsible for its therapeutic activities. This study aimed to isolate more flavonoid compounds present in the n-butanol fraction of the ethanol leaf extract of the plant. The n-butanol fraction of an ethanol leaf extract of Globimetula braunii was subjected to column chromatography over silica gel, and repeated gel filtration with Sephadex LH-20 eluted with methanol led to the isolation of a compound identified as the flavonoid glycoside, quercetin-3-O-rutinoside and its structure was elucidated on the basis of spectroscopic data.