Continuation of the photochemical examination of this plant (l) which has produced two antitumor principles, vincaleukoblastine and leurosine, has yielded six previously unreported minor alkaloids in addition to those already reported from these laboratories (2). Details of the procedure leading to the preparation of isoleurosine, lochneridine, sitsirikine sultate, vincamicine, Catharine, and vindolicine, as well as their preliminary characterization, are described. Copyright © 1961 Wiley‐Liss, Inc., A Wiley Company