Phenols in Rhododendron primulaeflorum Bur. et Franch / 中国药学杂志

OBJECTIVE: To study the phenols in the young branches and leaves of Rhododendron primulaeflorum Bur. et Franch. METHODS: The constituents were separated and purified by chromatographic methods, and their structures were elucidated by spectroscopic methods and chemical analyses. RESULTS: Eight known phenol compounds, cannabichromeorcinic acid(1), methylorsellinate(2), orsellinic acid(3), orcinol-O-β-D-glucopyranoside(4), 2, 6-dimethoxy-4-hydroxyphenyl-1-O-β-D-glucopyranoside(5), lyoniside(6), 4, 6-dihydroxy-2-O-(β-D-glucopyran-osyl) acetophenone(7) and 3, 5-dihydroxy-4-O-(β-D-glucopyranosyl) acetophenone(8) were isolated from the plant. CONCLUSION: All of the compounds except compound 2 were isolated from this plant for the first time. Copyright 2012 by the Chinese Pharmaceutical Association.

A New Phenylpropanol Glycoside from Twigs and Leaves of Rhododendron primulaeflorum / 中草药·英文版

ObjectiveTo study the constituents in the twigs and leaves of Rhododendron primulaeflorum.MethodsThe constituents were separated and purified with chromatographic methods.Their structures were elucidated by spectroscopic methods (1D,2D NMR,IR,and HR-ESI-MS) and chemical analyses.Results One new phenylpropanol glycoside,4-hydroxyl-5-methoxyl-phenylpropanol-3-O-β-D-glucopyranoside (1),and its aglycone (2) were successfully isolated from the twigs and leaves of R.primulaeflorum.ConclusionCompound 1 is a new phenylpropanol glycoside.Compounds 1 and 2 are isolated from this plant for the first time.