Hemislin B Glucoside, a New Lignan from Hemistepta lyrata

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From the ethanolie Extract of the whole plant of Hemistepta lyrata Bunge.,a new lignan, named hemislin B Glucoside,has been isolated as α-(trans-d-methoxy-4-O-β-Dglucopyranosylbenzylidene)-β-(3,4-dimethoxybenzyl)-γ-butyrolactone. Its structure has been established on the basis of UV, IR< FABMS,1H-NMR,13C-NMR, HMQC and HMBC speetral analysis.
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