Flavonoids of Gardenia cramerii and G. fosbergii bud exudates |
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| Authors: | A.A.leslie Gunatilaka Sarath R. Sirimanne Subramaniam Sotheeswaran H.T.Badra Sriyani |
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| Affiliation: | 1. Department of Chemistry, University of Peradeniya, Peradeniya, Sri Lanka |
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| Abstract: | From the bud exudates of Gardenia cramerii and G. fosbergii, two species endemic to Sri Lanka, a new flavonoid with an unusual B-ring oxidation pattern, 5,5′-dihydroxy-6,7,2′,3′-tetramethoxyflavone, was characterized. Two other rare flavonoids, 5,3′,5′-trihydroxy-3,6,7,4′-tetramethoxyflavone and 5-hydroxy-6,7,3′,4′,5′-pentamethoxyflavone were also isolated from both Gardenia species. |
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| Keywords: | Rubiaceae bud exudates 5,5′-dihydroxy-6,7,2′,3′-tetramethoxyflavone 5,3′,5′-trihydroxy-3,6,7,4′-tetramethoxyflavone 5-hydroxy-6,7,3′,4′,5′-pentamethoxyflavone. |
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