Now showing items 1-6 of 6
seco-Irldoids from Calycophyllum spruceanum (Rubiaceae)
(Phytochemistry, 2003-09-01) [Artigo]
Three seco-iridoids 7-methoxydidcrrosidc, 6'-O-acetyldiderroside and 8-O-tigloyldiderroside, were isolated from the wood bark of Calycophyllum spruceanum together with the known iridoids loganetin, loganin and the seco-iridoids ...
Antioxidant flavan-3-ols and flavonol glycosides from Maytenus aquifolium
(Phytotherapy Research, 2003-09-01) [Artigo]
TLC autographic assay revealed, in the EtOAc extract obtained from leaves and root bark of Maytenus aquifolium (Celastraceae), the presence of five compounds exhibiting antioxidant properties towards beta-carotene. They ...
Turbinatine, a potential key intermediate in the biosynthesis of corynanthean-type indole alkaloids
(Journal of Natural Products, 2003-07-01) [Editorial]
Extraction of the leaves of Chimarrhis turbinata has led to the isolation of turbinatine (1), a new corynanthean-type indole alkaloid, besides four known indole alkaloids, strictosidine, 5alpha-carboxystrictosidine, ...
Susceptibility of Apis mellifera (Hymenoptera: Apidae) to pellitorine, an amide isolated from Piper tuberculatum (Piperaceae)
(Apidologie, 2003-07-01) [Artigo]
The acute toxicity of pellitorine, an amide isolated from Piper tuberculatum (Piperaceae) which is studied as a biopesticide in European corner borer, was evaluated on larvae and newly emerged adults of honeybee Apis ...
Quantitative determination of anti-fungal and insecticide amides in adult plants, plantlets and callus from Piper tuberculatum by reverse-phase high-performance liquid chromatography
(Phytochemical Analysis, 2003-09-01) [Artigo]
A rapid, sensitive and reliable reverse-phase HPLC method was used for the quantitative determination of the anti-fungal and insecticide amides, dihydropiplartine (1), piplartine (2), Delta(alpha,beta)-dihydropiperine (3) ...
HPLC-EICD: An Useful Tool for the Pursuit of Novel Analytical Strategies for the Detection of Antioxidant Secondary Metabolites
(Journal of the Brazilian Chemical Society, 2003-11-24) [Artigo]
Living cells are continuously exposed to a variety of challenges that exert oxidative stress and are directly related with senescence and the onset of various pathological conditions such as coronary heart disease, rheumatoid ...