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Browsing by Author "Horak, RM"

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  • Van Heerden, FR; Horak, RM; Maharaj, VJ; Vleggaar, R; Senabe, JV; Gunning, PJ (Pergamon-Elsevier Science Ltd, 2007-04)
    Two new pregnane glycosides were isolated by fractionation of the dried stems of Hoodia gordonii. Their structures were determined as 3beta-[beta-D-thevetopyranosyl-(1→4)-beta-D-cymaropyranosyl-(1→4)-beta-D-cymaropyranos ...
  • Meth-Cohn, O; Horak, RM; Fouché, Gerda (Royal Society Chemistry, 1994-06-07)
    Alpha beta-Epoxy ketones on treatment with baker's yeast yield different types of products depending on their substitution. Small groups such as H or Me attached at the epoxy end protect that end from attack. Thus, 1-acyl ...
  • Maharaj, VJ; Senabe, JV; Horak, RM (2008-11)
    An appetite suppressant agent from Hoodia developed by CSIR scientists, promises to become the first natural food ingredient for weight management based on a plant indigenous to the African continent. The research programme ...
  • Horak, RM; Learmonth, RA; Maharaj, VJ (Pergamon-Elsevier Science Ltd, 1995-02-27)
    The preparation of 2-[2H]-l-(p-nitrophenyl)-1,2-epoxyheptan-3-one and its subsequent reduction by baker's yeast to the 2,3-diol is described. The mechanism of the reduction of the epoxide was determined using the B-2H ...
  • Vleggaar, R; Horak, RM; Maharaj, VJ (Royal Society of Chemistry, 1993-02)
    Incorporation studies of [2-(2)H(3),2-(13)C].acetate and different [2H, 13C]-labelled mevalonolactones into verruculogen established the stereochemical course of ring C formation in fumitremorgin B, which results in the ...