ALSTONIA ALKALOIDS. IV. THE STRUCTURE OF ALSTONILINE¹

ALSTONIA ALKALOIDS. IV. THE STRUCTURE OF ALSTONILINE¹ Alstonia Alkaloids. VI. The Structure of Alstoniline Oxide ALSTONIA ALKALOIDS. I. DEGRADATION OF ALSTONINE TO β-CARBOLINE BASES AND THE REDUCTION OF TETRAHYDROALSTONINE WITH SODIUM AND BUTYL ALCOHOL ALSTONIA ALKALOIDS. II. A NEW ALKALOID, ALSTONILINE, FROM A. CONSTRICTA Alstogustine and 19-epialstogustine, quaternary indole alkaloids from Alstonia angustifolia Alstophyllin, ein neues Indolalkaloid aus Alstonia macrophylla W<scp>ALL</scp> Corialstonine, a Novel Quinoline Alkaloid from Alstonia coriacea Alstophyllin, ein neues Indolalkaloid aus <i>Alstonia macrophylla</i> W<scp>ALL</scp> Alstolactines A–C, novel monoterpenoid indole alkaloids from Alstonia scholaris Isolation and Structural Studies on the Alkaloids of Alstonia macrophylla