RESUMEN
Besides solasonine, three new glycosides, namely, 3-O-alpha-L-rhamnopyranosyl-(1-->3)-solasodine, 3-O-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-rhamnopyranosyl-(1-->4)-beta -D- galactopyranosyl solasodine, and 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-galactopyranosyl solasodine, were isolated from Solanum unguiculatum (A.) Rich. Their structures were determined on the basis of chemical and spectral methods.
Asunto(s)
Glicósidos/aislamiento & purificación , Extractos Vegetales/aislamiento & purificación , Plantas Medicinales/química , Alcaloides Solanáceos/aislamiento & purificación , Secuencia de Carbohidratos , Glicósidos/química , Espectroscopía de Resonancia Magnética , Datos de Secuencia Molecular , Extractos Vegetales/química , Alcaloides Solanáceos/química , Espectrometría de Masa Bombardeada por Átomos Veloces , Espectrofotometría InfrarrojaRESUMEN
Column chromotography and preparative TLC of the light petroleum-diethyl ether extract from Bidens pilosa L. afforded tridecapentyn-1-ene, trideca-2,12-diene-4,6,8,10-tetrayne-1-ol, trideca-3,11-diene-5,7,9-triyne-1,2-diol and trideca-5-ene-7,9,11-triyne-3-ol. The compounds were identified on the bases of UV, 1H-NMR spectra and comparison with reported data. The chloroform extract was chromatographed to yield B-amyrin, phytosterin-B, esculetin and B-sitosterol glucoside. The petroleum ether extract afforded long chain ester, saturated hydrocarbon, long chain alcohol, B-amyrin, phytosterin-B, lupeol and lupeol acetate. GLC analysis of the fatty acids indicated the presence of 5 acids. The antimicrobial test was carried out to indicate an evident activity. The antidiabetic activity showed non significant decrease of blood glucose.
Asunto(s)
Plantas Medicinales/química , Animales , Cromatografía , Egipto , Masculino , Extractos Vegetales/farmacología , RatasRESUMEN
Diphenylamine has been isolated as one of the active antihyperglycemic agents of onion. It was identified by ir, uv, cmr, pmr, and mass spectra. It attained the highest percentage in mature onion bulbs; other onion organs contained diphenylamine in lower percentages. Green and black teas were found to contain relatively high percentages of diphenylamine, being higher in the former. Cooking was found to decrease the diphenylamine content.
