A New Bisxanthone from Hypericumjaponicum Thunb. Ex Murray

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A new bisxanthone, named bijaponicaxanthone C, was isolated from the whole plant of Hypericum japonicum. The structure was elucidated as 6-[1",5",6"-trihydroxy-2′′′-(β-hydroxy-β-methylethyl)-2′′′,3′′′-dihydrofuran(5′′′,4′′′,3 ",4")xanthone-3′′′-oxyl]- 1,3,5-trihydroxy-4-isoprenylxanthone (1) on the basis of the spectral and chemical evidences.
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