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Oppositin and 5-O-methylhoslundin, pyrone-substituted flavonoids ofHoslundia opposita

Authors
Journal
Phytochemistry
0031-9422
Publisher
Elsevier
Publication Date
Volume
32
Issue
5
Identifiers
DOI: 10.1016/s0031-9422(00)95112-4
Keywords
  • Hoslundia Opposita
  • Lamiaceae
  • Twigs
  • Oppositin
  • 5-O-Methylhoslundin
  • 6-C-Pyrone-Substituted 5
  • 7-Dimethoxyflavones.

Abstract

Abstract The methanolic extract of the twigs of Hoslundia opposita afforded two new pyrone-substituted flavonoids oppositin and 5- O-methylhoslundin, in addition to the known flavonoids tectochrysin, hoslunddiol and hoslundin. Oppositin has its 6- C-pyrone substituent attached via a 6,6″-link in contrast to the 6,5″-link in hoslundin and is a likely biogenetic precursor of hoslundin.

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