2 documents found, page 1 of 1
Isovitexin as marker and bioactive compound in the antinociceptive activity of ...
Strada,Claudia Lea; Lima,Karoline da C.; Silva,Virginia C. da; Ribeiro,Reginaldo V.; Dores,Eliana F.G. de C.; Dall'Oglio,Evandro L.Abstract Echinodorus scaber Rataj and Echinodorus grandiflorus (Cham. & Schltdl.) Micheli, Alismataceae, are popularly used to relieve inflammatory complaints and as diuretic. A study on the antinociceptive effect and selected marker compounds in eleven extracts from different locations was undertaken and their antinociceptive effect was assessed. The fingerprints were compared by HPLC-DAD and the content of vi...
New iodine derivatives of flavonol and isoflavone
Carvalho,Mário G. de; Silva,Virginia C. da; Silva,Tânia M.S. da; Camara,Celso A.; Braz-Filho,RaimundoThe reaction of the flavonol 3,7,3', 4'-tetra-O-methylquercetin (1) and of the isoflavone 7,4'-di-O-methylgenistein (2) with alkaline iodine in methanol afforded four new iodine derivatives: 8-iodo-5-hydroxy-3,7,3', 4'-tetramethoxy- flavone (1a) and 6-iodo-5-hydroxy-3,7,3', 4'-tetramethoxyflavone (1b) from 1; 2 afforded a mixture of two compounds, identified as a racemic mixture of (±)-trans-5-hydroxy-2,3,7,4'-...