Neriifolin, an ester glucoside of benzene-1,2,4-triol
Abstract
Neriifolin, a leaf metabolite of Protea neriifolia R. Br., is the 6-O-benzoyl-β-D-glucopyranoside of benzene-1,2,4-triol. The location of the benzoyloxy group on the sugar was directly confirmed by n.m.r. spectroscopy; the position of the glycosidic linkage to the benzenetriol was demonstrated by methylation and hydrolysis to 2,4-dimethoxyphenol (characterised by n.m.r. spectroscopy and by benzoylation).