From C a 1 p u r n ea a u r ea three quinolizidine alkaloids, viz. calpurnin, angelictiglic ester of 13-hydroxylupanin and virgilinpyrrolcarboxylic acid, have been isolated; the corresponding free bases, virgilin and 13-hydroxylupanin, are proved by TLC. lntrodtictionDuring the phytochemical investigation of Cadia purpurea [I-41 our attention was drawn to a related Caesalpiniacae, namely to Calpurnea aurea (= C. subdecandra = C . lasiogyne). This shrub occurs frequently in Ethiopia and resembles much on Cadia purpurea. However, there is a remarkable difference between the dried leaves of both shrubs: the leaves of Cadia purpurea curl to the main nerve (looking like pine-needles), whereas the leaves of Calpurnea aurea remain flat. WHITE [5] and GOOSEN [6] isolated from New Zealand's Calpurnea (under the name C. lasiogyne and C . subdecandra respectively), just the alkaloid calpurnin.
In leaves and twigs of Cadia purpurea were identified 13-hydroxylupanin and the fenylacetic-resp. tiglic ester; 1-spartein; lupanin; cadiamin, a dihydroxyluparzin (CIBH2BNP03); (+)-pinitol; alpha-amyrin and an aminoacid (C,H,,N02?, not identical with pipecolic acid).
From the leaves of the South African Leguminosae Virgilia oroboides and V. divaricata a new alkaloid virgiboidine, C (15)H (24)N (2)O, has been isolated by means of column chromatography. In these species 15 more alkaloids are detected, of which 6 are identified including lupinine.
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