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| Magalhães,Aderbal F.; Tozzi,Ana M.G.A.; Magalhães,Eva G.; Blanco,Ivani S.; Soriano,Maria-Del-Pilar C.. |
| The light petroleum extract from the roots of Lonchocarpus muehlbergianus Hassl contained nine flavonoids, including six new ones. These are 2,4-cis-2,4,5,8-tetramethoxy-(2´´,3´´:6,7)-furanoflavan; 2,4-cis-4-hydroxy-2,5,8-trimethoxy-(2´´,3´´:6,7)-furanoflavan; 2,4-cis-2-prenyloxy-4,5,8-trimethoxy-(2´´,3´´:6,7)-fu-ranoflavan; 2,4-cis-2-prenyloxy-4-hydroxy-5,8-dimethoxy-(2´´,3´´:6,7)-furanoflavan; 2',5',6'-trimethoxy-9-(1,1-dimethylallyoxy)-[2´´,3´´:3´,4´]-furanochalcone; 5,6-dimethoxy-(2´´,3´´:7,8)-furanoflavone, identi-fied by analysis of their spectral data (UV, IR, ¹H and 13C NMR, 2D-NMR, NOE and MS). The natural occurrence of 2,4-dioxygenated flavan derivatives is being reported for the first time. Quantitative analysis of the petrol extract, by using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lonchocarpus muehlbergianus; Leguminosae; Flavonoids; Flavans. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000400004 |
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| Magalhães,Aderbal F.; Tozzi,Ana Maria G.A.; Magalhães,Eva G.; Sannomiya,Miriam; Soriano,Maria del Pilar C.; Perez,Mary A.F.. |
| The analysis of root extracts from Lonchocarpus montanus A.M.G. Azevedo resulted in the isolation of twenty three compounds chiefly flavonoids of which five (four flavonoids and one benzophenone) are described for the first time. The molecular structures of the new compounds (1-5) were determined through spectral analysis (UV, IR, MS and NMR) as being: 2'-hydroxy-8-(<FONT FACE=Symbol>a,a</FONT>-dimethylallyl)-2", 2"-dimethylpyrano-(5",6":3',4')-dibenzoylmethane (1), 2'-methoxy-8-(<FONT FACE=Symbol>a, a</FONT>-dimethylallyl)-2", 2"-dimethylpyrano-(5",6":3',4')-dibenzoylmethane (2), 4'-methoxy-2",2"-dimethylpyrano-(5",6":8,7)-flavone (3), 2"-(1-hydroxy-1-methylethyl)-furano-(4",5":8,7)-flavone (4) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lonchocarpus montanus A.M.G. Azevedo; Leguminosae; Dibenzoylmethanes; Flavonoids; Flavones; Benzophenone; Bioautography; Artemia salina lethality. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000300001 |
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| Diaz,Aura M. P. de; Gottlieb,Otto R.; Magalhães,Aderbal F.; Magalhães,Eva G.; Maia,José G. S.; Santos,Celira C.. |
| Abstract Aniba affinis, A. cylindriflora and A. mas (Lauraceae) were found to contain respectively benzofuranoid (and a previously unknown bicyclo [3, 2, 1] octanoid) neolignans, 6-styryl-2-pyrones and 6-styryl-4-methoxy-2-pyrones. |
| Ano: 1977 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671977000100041 |
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