Thonningianins A and B, new antioxidants from the African medicinal herb Thonningia sanguinea

  • J Nat Prod. 2000 May;63(5):676-9. doi: 10.1021/np990396w.
I I Ohtani  1 ,  N Gotoh ,  J Tanaka ,  T Higa ,  M A Gyamfi ,  Y Aniya
Affiliations
  • 1. Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
PMID: 10843586 DOI: 10.1021/np990396w
Abstract

Two new ellagitannins, thonningianins A (1) and B (2), have been isolated from the African medicinal herb Thonningia sanguinea and their structures elucidated by interpretation of spectroscopic data. Both 1 and 2 showed strong free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) as shown by ESR analysis.

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