Abstract
A study of the alkaloidal content of trunk-barks of Pausinystalia macroceras (K. SCHUM.) PIERRE, Rubiaceae, resulted in the isolation of six alkaloids, five of which are indole
alkaloids that belong to the yohimbane and heteroyohimbane groups; among them, yohimbine
was found in major amount. Moreover, the levorotatory isomer of calycanthine, a quinoline
dimeric tryptophane derived base, has been isolated for the first time. The phytochemical
significance of calycanthine and related alkaloids is discussed.
Key Word Index
Pausinystalia macroceras - Rubiaceae - Indole Alkaloids - (-)Calycanthine - Tryptophane
Derived Alkaloids
