RESUMO
A new hemiterpene glycoside (1) was isolated from ripe tomatoes (the fruit of Lycopersicon esculentum, Solanaceae) along with eight known compounds. The chemical structure of 1 was determined to be 2-methylbutan-1-ol ß-d-glucopyranosyl-(1 â 6)-ß-d-glucopyranoside, based on spectroscopic data as well as chemical evidence. In addition, the radical-scavenging activities of the isolated compounds on the free radical of 1,1-diphenyl-2-picrylhydrazyl were examined. Among the tested compounds, tryptophan, 4-O-ß-d-glucopyranosyl caffeic acid and dihydro-p-coumaryl alcohol γ-O-ß-d-glucopyranoside demonstrated 42.0%, 50.1% and 76.0% scavenging activities, respectively, at a concentration of 0.5 mM.
Assuntos
Sequestradores de Radicais Livres/química , Frutas/química , Glicosídeos/química , Hemiterpenos/química , Solanum lycopersicum/química , Sequestradores de Radicais Livres/isolamento & purificação , Glicosídeos/isolamento & purificação , Hemiterpenos/isolamento & purificação , Estrutura MolecularRESUMO
Three new aromatic glycosides were isolated from the ripe fruit of cherry tomato [Lycopersicon esculentum var. cerasiforme (Dunal) Alef. (Solanaceae)] along with six known aromatic glycosides and one known steroidal alkaloid glycoside. Their chemical structures were determined on the basis of spectroscopic data as well as chemical evidence.
Assuntos
Frutas , Glicosídeos/isolamento & purificação , Extratos Vegetais/isolamento & purificação , Solanum lycopersicum , Antioxidantes/química , Antioxidantes/isolamento & purificação , Relação Dose-Resposta a Droga , Glicosídeos/química , Extratos Vegetais/químicaRESUMO
Besides 12 known glycosides, five new steroidal glycosides have been isolated from the stems of Solanum sodomaeum L. (Solanaceae). The chemical structures of these five glycosides were determined on the basis of spectroscopic data as well as chemical evidence, and the structure of one known steroidal glycoside was corrected.
Assuntos
Glicosídeos/química , Caules de Planta/química , Solanum/química , Esteroides/química , Modelos Moleculares , Estrutura MolecularRESUMO
Three new steroidal glycosides, named solaviasides A, B, and C, have been isolated from the fruits of Solanum viarum DUNAL (syn. S. khasianum var. chatterjeeanum, Solanaceae), along with seven known ones. Their chemical structures were determined on the basis of spectroscopic data and chemical evidence.
Assuntos
Frutas/química , Glicosídeos/química , Solanum/química , Esteroides/química , Sequência de Carboidratos , Glicosídeos/isolamento & purificação , Hidrólise , Espectroscopia de Ressonância Magnética , Metanol , Modelos Moleculares , Conformação Molecular , Dados de Sequência Molecular , Solventes , Espectrometria de Massas de Bombardeamento Rápido de Átomos , Esteroides/isolamento & purificaçãoRESUMO
A new steroidal glycoside and a new phenyl glycoside have been isolated from a ripe cherry tomato [Lycopersicon esculentum var. cerasiforme (DUNAL) ALEF., Solanaceae] along with two known steroidal alkaloid glycosides, esculeoisides A and B, and five aromatic compounds, zizibeoside I, benzyl alcohol beta-gentiobioside, rutin, methyl caffeate, and phenylalanine. Their chemical structures were determined on the basis of spectroscopic data as well as chemical evidence.