Oxo-Derivatives of Kopsine- and Rhazinilam-Type Alkaloids from a North Borneo<i>Kopsia</i>

Abstract

Abstract Two new alkaloids, kopsifine and rhazinicine, which are oxo-derivatives of kopsine and rhazinilam respectively, were obtained from the stem extract of Kopsia dasyrachis and their structures were established by spectral methods.