Antifungal phloroglucinol derivatives and lipophilic flavonoids from Helichrysum decumbens

From the aerial parts of Helichrysum decumbens, three new antifungal phloroglucinol derivatives have been identified. Their structures have been established by UV, IR, EIMS, FAB-MS, 1H NMR and 13C NMR techniques. In addition, the highly methylated flavonoids 3,5-dihydroxy-6,7,8-trimethoxyflavone, 5,...

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Veröffentlicht in:	Phytochemistry (Oxford) 1989, Vol.28 (6), p.1613-1615
Hauptverfasser:	Tomás-Lorente, Francisco, Iniesta-Sanmartín, Esther, Tomás-Barberán, Francisco A., Trowitzsch-Kienast, Wolfram, Wray, Victor
Format:	Artikel
Sprache:	eng
Schlagworte:	3,5-dihydroxy-6,7-dimethoxyfiavone Analytical, structural and metabolic biochemistry antifungal agents antifungal compounds Aromatic and heterocyclic compounds Biological and medical sciences chemical constituents of plants chemical structure Cladosporium herbarum Compositae derivatives flavonoids Fundamental and applied biological sciences. Psychology Helichrysum Helichrysum decumbens Heterocyclic compounds, pigments lipophilic flavonoids Other biological molecules prenylated phloroglucinols
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Zusammenfassung:	From the aerial parts of Helichrysum decumbens, three new antifungal phloroglucinol derivatives have been identified. Their structures have been established by UV, IR, EIMS, FAB-MS, 1H NMR and 13C NMR techniques. In addition, the highly methylated flavonoids 3,5-dihydroxy-6,7,8-trimethoxyflavone, 5,7-dihydroxy-3,6,8-trimethoxy-flavone and 3,5-dihydroxy-6,7-dimethoxyflavone have been detected, the latter being a new naturally occurring compound. The phloroglucinols prevented the growth of Cladosporium herbarum in a bio-assay. These secondary metabolises are externally deposited on the plant surfaces.
ISSN:	0031-9422 1873-3700
DOI:	10.1016/S0031-9422(00)97809-9