Vanda cristata

In an earlier study the acetate of the sample necine base laburnine (1) was isolated from Vanda cristata Lindl. In further investigations on the same genus and the related Vandopsis genus both laburnine and its diastereoisomer lindelofidine (2), together with their acetates, have been shown to be present in Vandopsis lissochiloides Pfitz. and Vandopsis gigantea Pfitz. The same two acetates occur in Vanda helvola Bl. and laburnine acetate occurs in Vanda hindsii Lindl. The behaviour of a constituent of Vanda luzonica Loher indicates that it is either laburnine acetate or its enantiomer. 

Lindstrom, B., and B. Tuning Studies on Orchidaceae Alkaloids. XIII. A New Alkaloid, Laburnine Acetate, from Vanda cristata Lindl. Acta Chem. Scand. 23, 3352 (1969). 

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