Metabolites of proteaceae. Part VIII. The occurrence of (+)-D-allose in nature: rubropilosin and pilorubrosin from Protea rubropilosa beard
Abstract
The leaves of Protea rubropilosa Beard contain (+)-D-allose in the form of the 6-O-cinnamate (rubropilosin) and the 6-O-benzoate (pilorubrosin) of 2-hydroxy-4-hydroxymethylphenyl β-D-allopyranoside. These constituents are accompanied in the plant by a β-phenylpropionate of the same glycoside.