Hepiiblicotioii of this repnrt is pernrittrd without tlre treed for forniol IUPAC perniissioii oii rariditioii that aii cic~kiiou~lr~l~eirieiit, w i t h fit11 r'efereiiiv logrtlier w i t h IUPAC copyright synihol (0 1995 IUPAC), is printed.Piiblicutioii of 11 tr'uii.vlutioii i i i t o uiiotlicr loirgituge is strl,icct to the udditioiiul cniiditioii nf prior approvolfroni rke r'elewiit IUPAC Nutioiral Adlreriiig Orguirizutinii.

No abstract

The structure and the stereochemistry of afrocurarine (a new unsymmetrical bisindole alkaloid) previously isolated from S. USAMBARENSIS Gilg. are established especially from (1)H-NMR spectroscopic data. The separation of quaternary alkaloids has always been very tedious. Ion-pair reversed-phase column chromatography applied to the purification of afrocurarine is proved very useful and seems to be a suitable technique in quaternary alkaloid research.

No abstract

In this paper, the authors present a student preparation of p-carboxyl group, as it makes the reaction product soluble in alkaline and insoluble in acid medium, provides for an easy way of separation.