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New 3-deoxyanthocyanidins from leaves of Arrabidaea chica
Beatriz Devia1, Gabriel Llabres, Jan Wouters
1Laboratory of Pharmacognosy, Institute of Pharmacy B36, University of Liège, CHU Sart-Tilman, Tour 4, B-4000 Liège, Belgium. beatrizdevia@kikirpa.be
Phytochemical Analysis : PCA
|May 23, 2002
Abstract:
Two new 3-deoxyanthocyanidins, 6,7,3',4'-tetrahydroxy-5-methoxyflavylium and 6,7,4'-trihydroxy-5-methoxyflavylium, and the pigment carajurin, which has been previously identified, were isolated from dried leaves of Arrabidaea chica, a creeper native to the American tropics. The structures of the components were elucidated by 1H- and 13C-NMR spectroscopy and HPLC-MS, including X-ray crystallographic analysis for carajurin.