RESUMO
<p><b>OBJECTIVE</b>To investigate the chemical constituents of Ligularia xanthotricha.</p><p><b>METHOD</b>Silica gel column chromatography and preparative TLC were employed for the isolation and purification. The structures were identified on the basis of spectral data (IR, EI-MS, 1H-NMR, 13C-NMR, DEPT) and chemical evidence.</p><p><b>RESULT</b>Seven compounds were isolated and identified as follows: lupeol (1), lupeol palmitate (2), 3, 28-dihydroxyl-lupeol (3), betulinic acid (4), taraxasterol (5), taraxasteryl palmitat (6) and taraxasteryl acetate(7).</p><p><b>CONCLUSION</b>All the compounds were isolated from this plant for the first time.</p>
Assuntos
Asteraceae , Química , Cromatografia em Gel , Cromatografia em Camada Fina , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Triterpenos Pentacíclicos , Espectrometria de Massas por Ionização por Electrospray , Esteróis , Química , Triterpenos , QuímicaRESUMO
<p><b>OBJECTIVE</b>To study the chemical constituents from Lamium maculatum var. kansuense.</p><p><b>METHOD</b>The chemical constituents were isolated and repeatedly purified on silica gel column and the structures were elucidated by the NMR spectra and physico-chemical properties.</p><p><b>RESULT</b>Six compounds were obtained and identified as polypodine B (I), 5-OH-8-epiloganin (II), shlanzhiside methyl ester (III), liriodendrin (IV), quercitroside (V), uridine (VI).</p><p><b>CONCLUSION</b>Compound IV was found from genus Lamium for the first time and the rest of the compounds were found from Lamium maculatum var kansuense for the first time.</p>