Alkaloids of ethiopian Calpurnia aurea subsp. aurea

Abstract Two novel alkaloids 3β,4α,13α-trihydroxylupanine and 3β,4α-dihydroxy 13α- O -(2′-pyrrolylcarbonyl)-lupanine (calpaurine) have been isolated from the leaves of Ethiopian Calpurnia aurea subsp. aurea . In addition, lupinine and epilupinine (both new for the genus), calpurmenine and calpurmenine pyrrolecarboxylic acid ester (previously found in subsp. sylvatica but not in subsp. aruea ) have been isolated together with 13-hydroxylupanine, its tiglate and pyrrolecarboxylic acid esters (calpumine), virgiline and virgiline pyrrolecarboxylic acid ester, alkaloids which have been reported previously from subsp. aruea .