Unusual glycosides of pyrrole alkaloid and 4′-hydroxyphenylethanamide from leaves of Moringa oleifera

Abstract

Glycosides of pyrrole alkaloid (pyrrolemarumine 4″- O-α- l-rhamnopyranoside) and 4′-hydroxyphenylethanamide (marumosides A and B) were isolated from leaves of Moringa oleifera along with eight known compounds; niazirin, methyl 4-(α- l-rhamnopyranosyloxy)benzylcarbamate, benzyl β- d-glucopyranoside, benzyl β- d-xylopyranosyl-(1 → 6)-β- d-glucopyranoside, kaempferol 3- O-β- d-glucopyranoside, quercetin 3- O-β- d-glucopyranoside, adenosine and l-tryptophan. Structure elucidations were based on analyses of chemical and spectroscopic data including 1D- and 2D-NMR.