Alkaloids from the bark of Holarrhena pubescens
1994
Begum, S. | Usmani, S.B. | Siddiqui, B.S. | Siddiqui, S.
Three new alkaloids, namely, 4,6-dien-3-oxo-N-demethylconanine (pubescine), 1,4-dien-3-oxo-N-demethylconine (norholadiene) and 3-dimethylamino-5-en-12 alpha-hydroxyconanine (pubescimine), have been isolated from the bark of Holarrhena pubescens and their structures elucidated through exhaustive 1D and 2D NMR (COSY-45, NOESY, J-resolved and HMQC).
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