Popis: |
The heartwood of Dalbergia miscolobium contains, in addition to the neoflavonoids ( S )-4-methoxydal-bergione, ( S )-4′-hydroxy-4-methoxydalbergione and dalbergin, the isoflavone di- O -methyldaidzein, the benzophenone cearoin and two cinnamylphenols, violastyrene [ E -1-(3-hydroxy-2,4-dimethoxybenzyl)-2-phenylethylene] and isoviolastyrene [ E -1-(4-hydroxy-2,3-dimethyoxybenzyl)-2-phenylethylene]. The structural determination of the cinnamylphenols relied on spectra, degradations and synthesis. |