Communicationsproposal might invoke a [T2 + r2] intramolecular cyclization to 15 which by suitable hydrogen shift and bond reorganization is transformed into 8.18
Die Isolierung und Strukturau?dämng der antileukämisch wirksamen Substanzen Bruceantin (Ia) und Bruceantinol (Ic) sowie weiterer Quassinoide Bruceantarin (Ib), Dehydrobruceantin (IIa), Dehydrobruceantorin (IIb), Dehydrobrucein B (Ilc), Dehydrobruceantol (IId) sowie Isobrucein B (III) werden beschrieben.
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