title: [Alkaloids of Pausinystalia macroceras].
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.
authors.affiliation: Laboratoire de Pharmacognosie, Faculté de Pharmacie, Chatenay-Malabry, France.
authors.forename: M
authors.initials: M
authors.lastname: Leboef
authors.forename: A
authors.initials: A
authors.lastname: Cavé
authors.forename: P
authors.initials: P
authors.lastname: Mangeney
authors.forename: A
authors.initials: A
authors.lastname: Bouquet