Abstract
Hirsutine, hirsuteine, rhynchophylline, isorhynchophylline, rotundifoline, isorotundifoline,
mitraphylline, isomitraphylline, rhynchophylline N–oxide and anti rotundifoline N–oxide
have been isolated from Mitragyna rubrostipulata (Schum.) Havil. All were present in the root bark but hirsutine and hirsuteine were
not found in the leaves or stem bark. Comparative studies have been made of the distribution
of these same alkaloids in related species of Mitragyna.
Key Word Index
Mitragyna rubrostipulata - Rubiaceae - Indole and Oxindole Alkaloids - Antirotundifoline
N–oxide - Rhynchophylline N–oxide
