Angustilobine and andranginine type indole alkaloids and an uleine-secovallesamine bisindole alkaloid from Alstonia angustiloba

► Twenty alkaloids were isolated from Alstonia angustiloba. ► Angustilobine C is a new indole alkaloid of the angustilobine type. ► Angustiphylline represents the first isolation of an uleine-secovallesamine bisindole.