BENZOYLATED DERIVATIVES OF 2-BETA-GLUCOPYRANOSYLOXY-2,5-DIHYDROXYBENZYL, ALCOHOL FROM XYLOSMA-FLEXUOSUM - STRUCTURE AND RELATIVE CONFIGURATION OF XYLOSMIN

Comprehensive 2D nmr, ms, and X-ray diffraction studies have led to th e characterization of a novel derivative of 2-(beta-glucopyranosyloxy) -2,5-dihydroxybenzyl alcohol from the aerial parts of Xylosma flexuosu m. This compound, which has been given the trivial name xylosmin, was identified as benzyl-1R,2R,6R-trihydroxy-3-oxocyclohex-4-enoate. Three related compounds were identified as salireposide, poliothrysoside an d 2'-benzoylpoliothrysoside, the last of which is also new.