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(-)-delta-N-normethylskytanthine from Tecoma arequipensis
G H Harris1, E C Fixman, F R Stermitz
1Department of Chemistry, Colorado State University, Fort Collins 80523.
Journal of Natural Products
|May 1, 1988
Abstract:
Bark of Tecoma arequipensis yielded the major alkaloidal component (-)-delta-N-normethylskytanthine whose structure was proven by X-ray diffraction analysis of the N-thiourea derivative. The stereochemistry of 1 at all four centers was enantiomeric with that of skytanthine previously reported from Tecoma stans and Skytanthus acutus. Gc-ms of the crude base fraction indicated the presence of several related alkaloids as very minor constituents.