PHYTOCHEMISTRY OF THE ERICACEAE .10. 3-DESOXYCALLUNIN AND 2''-ACETYLCALLUNIN, 2 MINOR 2,3-DIHYDROFLAVONOID GLUCOSIDES FROM CALLUNA-VULGARIS

The ethyl acetate soluble fraction obtained from the acetone extract o f fresh Calluna vulgaris heather flowers afforded a mixture of two min or 2,3-dihydroflavonoid glucosides. Separations were achieved by colum n chromatography on polyamide as well as by reversed phase MPLC and HP LC. Structural elucidations were performed by UV, H-1 and C-13 NMR. Th e two novel compounds which are related to the major constituent, call unin were identified as 3-desoxycallunin and 2''-acetylcallunin. This is the first report of a flavanone 8-glucoside and the second report o f a dihydroflavonol 8-glucoside in the plant kingdom.