Conferols A and B, new anti-inflammatory 4-hydroxyisoflavones from Caragana conferta

Chem Pharm Bull (Tokyo). 2009 Apr;57(4):415-7. doi: 10.1248/cpb.57.415.

Abstract

Conferols A (1) and B (2), the new 4-hydroxyisoflavones, have been isolated from the dichloromethane sub-fraction of the methanolic extract of Caragana conferta along with 3',5'-dihydroxy, 7,4'-dimethoxyisoflavone (3), E-cinnamic acid (4), tetracosyl 3,4-dihydroxy-E-cinnamate (5), docosyl 3,4-dihydroxy-E-cinnamate (6), beta-sitosterol (7), beta-sitostrerol 3-O-beta-D-glucopyranoside (8), stigmasterol (9) and lupeol (10), respectively, reported for the first time from this species. The structures of the new compounds were elucidated through spectroscopic techniques including MS and 2D-NMR. The compounds 1-3 showed significant anti-inflammatory activity in the respiratory burst assay.

MeSH terms

  • Anti-Inflammatory Agents, Non-Steroidal / isolation & purification
  • Anti-Inflammatory Agents, Non-Steroidal / pharmacology*
  • Biological Assay
  • Caragana / chemistry*
  • Cells, Cultured
  • Humans
  • Isoflavones / isolation & purification
  • Isoflavones / pharmacology*
  • Molecular Structure
  • Neutrophil Activation / drug effects
  • Plant Extracts / isolation & purification
  • Plant Extracts / pharmacology
  • Respiratory Burst / drug effects

Substances

  • Anti-Inflammatory Agents, Non-Steroidal
  • Isoflavones
  • Plant Extracts
  • conferol A
  • conferol B