Angustimaline, an unusual nitrogenous compound from Alstonia angustifolia

Angustimaline, an unusual nitrogenous compound from Alstonia angustifolia Unusual Nitrogenous Derivatives from Alstonia Angustilodine, an Unusual Pentacyclic Indole Alkaloid from <i>Alstonia</i> Angustilobine and andranginine type indole alkaloids and an uleine–secovallesamine bisindole alkaloid from Alstonia angustiloba Angustilodine, an Unusual Pentacyclic Indole Alkaloid from Alstonia Angustilobine and andranginine type indole alkaloids and an uleine–secovallesamine bisindole alkaloid from Alstonia angustiloba Alkaloids of Alstonia angustifolia Alkaloids of Alstonia angustifolia Oxidized Derivatives of Macroline, Sarpagine, and Pleiocarpamine Alkaloids from <i>Alstonia angustifolia</i> Oxidized Derivatives of Macroline, Sarpagine, and Pleiocarpamine Alkaloids from <i>Alstonia angustifolia</i>