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Rhododendrol glycosides and phenyl glucoside esters from inner bark of Betula pubescens

1994; Elsevier BV; Volume: 36; Issue: 1 Linguagem: Inglês

10.1016/s0031-9422(00)97017-1

1873-3700

Hefeng Pan, Lennart Lundgren,

Sesquiterpenes and Asteraceae Studies

A chemical investigation of the inner bark of Betula pubescens has led to the isolation of rhododendrin, epirhododendrin, apiosylrhododendrin and apiosylepirhododendrin. This is the first observation of both (+)- and (−)-rhododendrol glycosides in the same species. Also, the new compounds 3,4,5-trimethoxyphenyl-6-O-vanilloyl-β-d-glucopyranoside and 3,4,5-trimethoxyphenyl-6-O-syringoyl-β-d-glucopyranoside, and the known 4-O-β-d-glucoside of p-hydroxybenzoic acid, as well as (+)-catechin, catechin 7-O-β-d-xylopyranoside and B1 and B3 procyanidins were found.