Phenolics of Moringa oleifera leaves

Abstract

Five flavonol glycosides characterised as kaempferide 3-O-(2″,3″-diacetylglucoside), kaempferide 3-O-(2″-O-galloylrhamnoside), kaempferide 3-O-(2″-O-galloylrutinoside)-7-O-α-rhamnoside, kaempferol 3-O-[β-glucosyl-(1 → 2)]-[α-rhamnosyl-(1 → 6)]-β-glucoside-7-O-α-rhamnoside and kaempferol 3-O-[α-rhamnosyl-(1 → 2)]-[α-rhamnosyl-(1 → 4)]-β-glucoside-7-O-α-rhamnoside together with benzoic acid 4-O-β-glucoside, benzoic acid 4-O-α-rhamnosyl-(1 → 2)-β-glucoside and benzaldehyde 4-O-β-glucoside have been isolated from methanolic extract of Moringa oleifera leaves. Also obtained from the same extract were known compounds, kaempferol 3-O-α-rhamnoside, kaempferol, syringic acid, gallic acid, rutin and quercetin 3-O-β-glucoside. Their structures were determined using spectroscopic methods as well as comparison with data from known compounds.

Keywords:

• Moringa oleifera
• Moringaceae
• Flavonol glycosides
• Benzoic acid glycosides
• Benzaldehyde 4-O-β-glucoside
• Leaves

Acknowledgements

The authors are grateful to Alexander von Humboldt Stiftung and DAAD for awarding L. Manguro a fellowship.