RESUMO
Loasins A (1) and B (2), new flavonoids, have been isolated from the ethyl acetate soluble sub-fraction of the ethanolic extract of Eremostachys loasifolia along with apuleisin (3) and apuleidin (4), isolated for the first time from this species. Their structures were assigned on the basis of their spectral data including 1D and 2D NMR.
Assuntos
Flavonas/isolamento & purificação , Flavonoides/isolamento & purificação , Lamiaceae/química , Extratos Vegetais/análise , Etanol , Flavonas/química , Flavonoides/química , Espectroscopia de Ressonância Magnética , Estrutura MolecularRESUMO
Spiraeamide, a new sphingolipid, has been isolated from the ethyl acetate-soluble fraction of the methanolic extract of the whole plant of Spiraea brahuica, along with marrubiin, 19-acetylmarrubenol, and 6-acetylmarruenol. Their structures were elucidated by ¹H and ¹³C NMR spectra, and COSY, NOESY, HMQC, HMBC, EI-MS, and FAB-MS experiments.
Assuntos
Esfingolipídeos/isolamento & purificação , Spiraea/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Paquistão , Esfingolipídeos/químicaRESUMO
Vicarin (1), a new isoflavone, has been isolated from the ethyl acetate-soluble fraction of the ethanolic extract of Eremostachys vicaryi, along with soforanarin B (2), luteolin 7-O-ß-D-glucopyranoside (3), and hamighriprasin (4). Their structures were elucidated on the basis of their spectral data including MS and 2D NMR.
Assuntos
Isoflavonas/isolamento & purificação , Lamiaceae/química , Glicosídeos/química , Glicosídeos/isolamento & purificação , Isoflavonas/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , PaquistãoRESUMO
Loasifolin (1), a new highly oxygenated flavonoid, has been isolated from Eremostachys loasifolia and its structure is assigned on the basis of spectroscopic data including 1D and 2D NMR techniques. 6,7-Dihydroxycoumarin (2) and luteolin 4'-O-beta-d-glucopyranoside (3) have also been isolated for the first time from the genus Eremostachys.