Pegel, Karl H.Piacenza, Lorenzo Piero Luigi.2014-11-182014-11-1819731973http://hdl.handle.net/10413/11589Thesis (Ph.D.)-University of Natal, Durban, 1973.No abstract available.en-ZATheses--Chemistry.The chemistry of novel diterpenes from androstachys johnsonii Prain.Thesis