Browsing by Author "Achenbach, Hans"

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    Ophrypetalin and Other Annonaceous Acetogenins From Ophrypetalum Odoratum
    (Taylor and Francis, 1999-05) Sung'hwa, Fortunatus; Mgina, Clarence A.; Jonker, Stephan A.; Nkunya, Mayunga H. H.; Waibel, Reiner; Achenbach, Hans
    Ophrypetalin, a new bis-tetrahydrofuran acetogenin, was isolated from Ophrypetalum odoratum (Annonaceae) together with the known acetogenins desacetyluvaricin, rolliniastatin-1, dieporeticenin and a mixture of dieporeticanin-1, dieporeticanin-2, and diepoxyrollin. the structures were elucidated by spectroscopic methods. the absolute configurations were established by Mosher's method and by CD measurements.
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    Tanzanene, A Spiro Benzopyranyl Sesquiterpene From Uvaria Tanzaniae Verdc
    (1991-08) Weenen, Hugo; Nkunya, Mayunga H.H.; Mgani, Q.A.; Posthumus, Maarten A.; Waibel, Reiner; Achenbach, Hans