New water soluble flavone and xanthone glycosides from Hypericum canariense L. |
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Authors: | Jesús G. Díaz Pedro Perez de Paz Werner Herz |
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Affiliation: | 1. Instituto Universitario de Bio-Orgánica “Antonio González”, La Laguna, Tenerife, Spain;2. Departamento de Botanica, Facultad de Farmacia, Universidad de La Laguna, Tenerife, Spain;3. Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, FL 32306-4, United States |
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Abstract: | The water soluble portion of the aerial parts of Hypericum canariense L. yielded after acetylation the 5,7,3′4′-tetra- and 7,3′4′-triacetates of a new flavonoid 5,7,3′,4′-tetrahydroxy-3-O-β-d-(methyl 2,3,4-triacetoxypyranuronyl)-quercetin, the 3′-acetate of a new flavonoid 3′-hydroxy-5,7,4′-trimethoxy-3-O-β-d-(methyl 2,3,4-triacetoxypyranuronyl)-quercetin, the 3′-acetate and the 3′5′-diacetate of the new flavonoid 5,3′dihydroxy-7,4′-dimethoxy-3-β-d-(methyl 2,3,4-triacetoxypyranuronyl)-quercetin, the xanthone derivative mangiferin 2′,3′,4′,6′-tetraacetate and the latter's new 1,3,6,7′-tetramethoxy, 1,3,6-trimethoxy-4-acetoxy and 1,7-diacetoxy-3,6-dimethoxy analogs. |
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