RESUMO
The aerial part of Leptadenia arborea has been shown to contain pinoresinol (1), syringaresinol (2), leucanthemitol (3) and E-ferulaldehyde (4). These known compounds are being reported for the first time from this plant. Among them, syringaresinol has shown an inhibitory effect against acetylcholinesterase. The IC(50) (the concentration of 50% enzyme inhibition) value of this compound was 200 microg/ml.
Assuntos
Apocynaceae , Inibidores da Colinesterase/farmacologia , Furanos/farmacologia , Lignanas/farmacologia , Fitoterapia , Extratos Vegetais/farmacologia , Acetilcolinesterase , Inibidores da Colinesterase/administração & dosagem , Inibidores da Colinesterase/uso terapêutico , Furanos/administração & dosagem , Furanos/uso terapêutico , Humanos , Concentração Inibidora 50 , Lignanas/administração & dosagem , Lignanas/uso terapêutico , Componentes Aéreos da Planta , Extratos Vegetais/administração & dosagem , Extratos Vegetais/uso terapêuticoRESUMO
Two new pregnane ester glycosides, named stemmoside A (1) and stemmoside B (2) and a third new polyhydroxy pregnane, named stemmin C (3), were isolated from Solenostemma argel leaves. The structures were achieved by extensive one- and two-dimensional NMR and MS spectroscopic analysis.
Assuntos
Apocynaceae , Fitoterapia , Extratos Vegetais/química , Pregnanos/química , Esteroides/química , Humanos , Espectroscopia de Ressonância Magnética , Folhas de PlantaRESUMO
A new trinortriterpenoid, 1-epibrachyacarpone, was isolated from aerial parts of Cleome chrysantha. Its structure was elucidated as 1 by NMR investigations and X-ray crystallographic studies.