| | 1 | Author
| Eckhard Wollenweber, VolkerH. Dietz, D. Etlef Schillo, G.Erhard Schilling | Requires cookie* | | | Title
| A Series of Novel Flavanones from Fern Exudates  | | | | Abstract
| The white farinose exudate on the fronds o f Cheilanthes argentea contains a series of flavanones as minor constituents. These were identified by spectroscopic methods as: 5,4'-diOH,6,7-diOMe flavanone and its 4'-OMe derivative, 5,4'-diOH,7,8-diOMe flavanone and its 4'-OMe derivative, 5,6-diOH,7,8,4'-triOMe flavanone, 5,4'-diOH, 6,7,8-triOMe flavanone and its 4'-OMe derivative. The farina o f Notholaena limitanea var. mexicana contains eriodictyol-7,4'-di-methyl ether and eriodictyol-7,3', 4'-trimethyl ether as minor components. Both compounds were also identified in the exudate of N. fendleri, together with naringenin-7-OMe and naringenin-4'-OMe. In N. lemmonii var. lemmonii trace amounts of 5-OH,7,3',4',5'-tetra-OMe flavanone were detected. Nine of these substances are novel natural flavanones. | | | |
Reference
| Z. Naturforsch. 35c, 685—690 (1980); received June 4 1980 | | | |
Published
| 1980 | | | |
Keywords
| Cheilanthes argentea, Notholaena, Polypodiaceae, Farinose Exudate, Methylated Flavanones | | | |
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| default:Reihe_C/35/ZNC-1980-35c-0685.pdf | | | | Identifier
| ZNC-1980-35c-0685 | | | | Volume
| 35 | |
| 2 | Author
| VolkerH. Dietz, Eckhard Wollenweber, Jean Favre-Bonvin, LuisD. Gómez, P. | Requires cookie* | | | Title
| A Novel Class of Complex Flavonoids from the Frond Exudate of Pityrogramma trifoliata | | | | Abstract
| Fronds o f the neotropical fern Pityrogram m a trifoliata produce a farinose exudate which consists mainly o f a dihydrochalcone. The structure o f som e minor constituents has been elucidated by spectroscopic m ethods. They are shown to be representatives o f a novel class o f complex flavonoids, com posed o f a flavonoid and a neoflavonoid moiety. In other terms, they are 5,7-di-hydroxy-8-cinnam oyl-4-phenyl-dihydrocoum arins. The occurence o f these and closely related compounds in this fern's exudate supports its inclusion in the genus Pityrogramma. | | | |
Reference
| Z. Naturforsch. 35c, 36—4 (1980); received Septem ber 25 1979 | | | |
Published
| 1980 | | | |
Keywords
| Pityrogramma trifoliata, Polypodiaceae, Farinose Exudate, Com plex Flavonoids, Cinnamoyl-phenyl-dihydrocoumarins | | | |
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| default:Reihe_C/35/ZNC-1980-35c-0036.pdf | | | | Identifier
| ZNC-1980-35c-0036 | | | | Volume
| 35 | |
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