Phytochemical Studies on Stemona burkillii Prain: Two New Dihydrostemofoline Alkaloids

American Chemical Society
Publication Type:
Journal Article
Journal of Natural Products, 2004, 67 (10), pp. 1740 - 1743
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Two new dihydrostemofoline alkaloids, 11(S),12(R)-dihydrostemofoline (3) and stemoburkilline (4), along with stemofoline (1) and 2`-hydroxystemofoline (2) have been isolated from a root extract of Stemona burkillii Prain. The structure and relative configuration of 3 have been determined via spectroscopic data and from comparison with synthetic 11(S),12(S)-dihydrostemofoline (5). The configuration of the exo-cyclic alkene group in 4 is tentively assigned as E on the basis of mechanistic considerations.
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