OBJECTIVE To investigate the butanol fraction of the water/acetone extract and isolate of the new flavonoids from Launeae arboescens. METHODS The compounds were isolated by liquid chromatographic methods and their structures were identified by using spectroscopic analysis. RESULTS THE ISOLATED COMPOUNDS WERE IDENTIFIED AS: 7-O-[α-rhamnopyranosyl 4',5,6-Trihydroxy flavone 1,4',5'-Di-Methoxy ...

the methanolic extract of the aerial parts of salvia leriaefolia (labiatae) afforded 5-hydroxy-4´, 6, 7-trimethoxy flavone (salvigenin) and (5,4´-dihydroxy-7-methoxy flavone (genkwanin). the structures of the isolated compounds were elucidated using 1 and 2 d-nmr, ir, uv and ms.

Five new highly oxygenated lanostane-type triterpenoids [ganoderic acid GS-1 (1), ganoderic acid GS-2 (2), ganoderic acid GS-3 (3), 20(21)-dehydrolucidenic acid N (4) and 20-hydroxylucidenic acid A (5)] were isolated from the fruiting body of Ganoderma sinense, together with known compounds including 6 triterpenoids and 3 sterols. The structures of the new triterpenoids determined by spectrosco...

In botany textbooks the farinose coating on leaves and inflorescences of many Primula species is still often said to "consist of flavone". We have shown earlier [1, 2] that it is in fact formed by varying amounts of unsubstituted flavone (at least 50%), 5-hydroxy flavone and 2'-hydroxy flavone, accompanied in many species by 5,8-dihydroxy flavone (primetin) and 5,2'-dihydroxyflavone. Further co...

Methyl 2,5-dihydroxy-4-(31-methyl-21-butenyl)benzoate (1) was isolated from the root of Erythrina subumbrans. The chemical structure of 1 has been elucidated based on spectroscopy UV-Vis, HRESIMS, 1D and 2D NMR analysis.

Five new podocarpane-type trinorditerpenes were isolated from the bark of Taiwania cryptomerioides. Structures of 1beta, 14-dihydroxy-13-methoxy-6,8,11,13-podocarpatetraene (1), 1beta, 14-dihydroxy-13-methoxy-8,11,13-podocarpatriene (2), 13-hydroxy-12-methoxy-8,11,13-podocarpatrien-3-one (3), 14-hydroxy-13-methoxy-1,8,11,13-podocarpatetraen-3-one (4), and 13-methoxy-8,12-podocarpatriene-11,14-d...