19(R)-Hydroxyeburnamine and 19(R)-Hydroxy-Isoeburnamine from Kopsia Dasyrachis

Natural Product Letters
1998.0

Abstract

Two new alkaloids, (+)-19(A)-hydroxyebumamine and (-)-19(R)-hydroxy-isoeburnamine, in addition to the known eburnane compounds, (+)-eburnamonine and (+)-isoeburnamine, and the bisindole, kopsoffinol, were obtained from the stem extract of Kopsia dasyrachis and their structures were established by spectral methods and X-ray analysis.

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