Thonningianins A and B, new antioxidants from the African medicinal herb Thonningia sanguinea
I I Ohtani1, N Gotoh, J Tanaka
1Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
Journal of Natural Products
|June 8, 2000
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.

