The molecule is a quercetin O-glucoside in which a alpha-L-rhamnopyranosyl-(1->2)-alpha-L-arabinopyranosyl and a beta-D-glucopyranosyl residue is attached respectively via a glycosidic linkage at positions 3 and 7 of quercetin. It is isolated from the aerial parts of Putoria calabrica and exhibits radical scavenging activity. It has a role as a metabolite and a radical scavenger. It is a beta-D-glucoside and a quercetin O-glucoside.
2-(3,4-dihydroxyphenyl)-3-[(2S,3R,4S,5S)-4,5-dihydroxy-3-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-5-hydroxy-7-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-4-one