| Popis: |
From tubers of Pleione bulbocodioides , one new polyphenol, pleionol, and two new bibenzyls, bulbocodin and bulbocol were isolated together with three known compounds, 3,3′-dihydroxy-4-( p -hydroxybenzyl)-5-methoxybibenzyl, 3,3′-dihydroxy-2-( p -hydroxybenzyl)-5-methoxybibenzyl, 3′,5-dihydroxy-2-( p -hydroxybenzyl)-3-methoxybibenzyl. The new structures were elucidated as 2,8-dihydroxy-5-(4′-hydroxy-3′-methoxyphenyl)-4-methoxy-10,11-dihydrodibenzo[a,d]cycloheptene, 2′,3-dihydroxy-5-methoxy-2,5′,6-tri( p -hydroxybenzyl)bibenzyl and 3,3′-dimethoxy-5-hydroxy-2-( p -hydroxybenzyl)bibenzyl from their spectroscopic data. |
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