Michel Plat

Feretoside et gardenoside du Feretia apodanthera: rmn du carbone 13 en série iridoide

Abstract The 13 C NMR spectra of some iridoids of known structure are analysed. The data obtained have been applied to the determination of structure of feretoside and the identification of gardenoside, both isolated from the stem bark of Feretia apodanthera .

Monoclonal antibodies to bis-indole alkaloids of Catharanthus roseus and their use in enzyme-linked immuno-sorbent-assays

High affinity monoclonal antibodies directed against bis-indole alkaloids from Catharanthus roseus were produced. Once characterized, they were used to develop sensitive enzyme-linked-immuno-sorbent-assays, enabling us to determine minute quantities of alkaloids related to vinblastine in plant material.

CINQ alcaloides nouveaux de Strychnos henningsii

Abstract Five new alkaloids have been isolated from the leaves and stems of Strychnos henningsii : tsilanimbine, N a -desacetyl-17- O -acetyl-18-hydroxyisoretuline, 18-hydroxyisoretuline, N a -desacetylisoretuline and N a -desacetyl-18-hydroxyisoretuline. The two latter, unknown as natural products, have already been obtained by degradation of strychnine.

Alcaloïdes d'Ochrosia miana: Ochromianine et Ochromianoxine

Abstract The structure of ochromianine and ochromianoxine two new alkaloids isolated from the barks of Ochrosia miana are deduced from spectral analysis.

Two methylenedioxyflavones from Zieridium ignambiensis

Abstract The alkaloid evolitrine, the flavone meliternatin and a new flavonoid, 3,7-dihydroxy,5,6-dimethoxy,3′,4′-methylenedioxyflavone were obtained from the root bark of Zieridum ignambiensis .