Author/Authors :
Beniddir، نويسنده , , Mehdi A. and Martin، نويسنده , , Marie-Thérèse and Tran Huu Dau، نويسنده , , Marie-Elise and Rasoanaivo، نويسنده , , Philippe and Guéritte، نويسنده , , Françoise and Litaudon، نويسنده , , Marc، نويسنده ,
Abstract :
Three new bisindole alkaloids (1–3), possessing a rare carbon skeleton formed by two indole moieties fused via a dihydropyran unit, were isolated from the alkaloid extract of the stem bark of Gonioma malagasy. Their structure and absolute configuration were assigned thanks to a combination of one and two dimensional NMR spectroscopy and ECD calculations. These bisindole alkaloids are artifacts formed during alkaloid extraction.
Keywords :
artifact , Gonioma malagasy , Pleiocarpamine , Quebrachamine , ECD
