A new phenylethanol glycoside from Leonurus japonicus
The column chromatography and semi-preparative liquid phase chromatography with several chromatographic packing materials,including macroporous adsorbent resin,silica gel,ODS,and Sephadex LH-20,were used for the separation and purification of n-butanol-soluble portion of ethanol extract of Leonurus japonicus Houtt.The structures of isolates were identified by HR-MS,IR,NMR,and acid hydrolysis reaction.Six phenylethanol glycosides were obtained from L.japonicus and identified as leonoside G(1),leonoside E(2),leonoside B(3),leonoside F(4),cistanoside G(5),and salidroside(6).Compound 1 is a new phenylethanol glycoside.
Leonurus japonicus Houtt.chemical constituentphenylethanol glycosideseparation and struc-tural characterization
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