Now showing items 1-4 of 4
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, ...
New antioxidant C-glucosylxanthones from the stems of Arrabidaea samydoides
(Journal of Natural Products, 2003-10-01) [Artigo]
Three new C-glucosylxanthones, 2-(2'-O-trans-caffeoyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (1), 2-(2'-O-trans-cinnamoyl)-C-beta-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthone (2), and 2-(2'-O-trans-coumar ...