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Paper | Regular issue | Vol 26, No. 2, 1987, pp.413-419
Published online, 1st January, 1970
DOI: 10.3987/R-1987-02-0413
Isolation of 19,20-Z-Vallesamine and 19,20-E-Vallesamine from Alstonia scholaris

Atta-ur-Rahman, Khisal Ahmad Alvi, Syed Ali Abbas, and Wolfgang Voelter

*H. E. J. Postgraduate Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan

Abstract

A new alkaloid 19,20-Z-Vallesamine along with 19,20-E-vallesamine has been isolated from the leaves of Alstonia scholaris and the stereochemistry has been deduced from NOE measurements.