Warren, Frank Louis.Jeffs, P. W.2014-11-252014-11-2519601960http://hdl.handle.net/10413/11646Thesis (Ph.D.)-University of Natal, 1960.No abstract available.en-ZATheses--Chemistry.The alkaloids of the Amaryllidaceae : the isolation and structures of two new alkaloids from Haemanthus natalensis and Nerine krigeii and contributions to the chemistry of coccinine : the absolute configuration of alkaloids based on the 5:10b-Ethanophenanthridine nucleus.Thesis