Two novel minor alkaloids from Ethiopian Calpurnia aurea Ssp. aurea.
Two novel minor quinolizidine alkaloids 4 beta-hydroxy-13alpha- O-(2'-pyrrolylcarbonyl)-lupanine (digittine) and its amino alcohol, 4 beta, 13alpha-dihydroxylupanine, have been isolated from Ethiopian Calpurnia aurea ssp. aurea. The structures of these alkaloids were determined by chemical transformation and by means of spectroscopic techniques (UV, IR, CD, MS, (1)H-NMR and (13)C-NMR) including two dimensional NMR.
Asres
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K
The School of Pharmacy, University of London 29-39 Brunswick Square, London WC1N 1AX, U.K.
Phillipson
J D
JD
Mascagni
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