[Annonacins and Annonastatin from Annona squamosa].
Annonacin ( 1), annonacin A ( 6), and annonastatin ( 7) were isolated from the seeds of ANNONA SQUAMOSA L. (Annonaceae). Compounds 6 and 7 are described for the first time. The relative configuration of the tetrahydrofuran core of 1 (with hitherto unknown configuration), as well as those of compounds 6, and 7 were established by (13)C- and (1)H-NMR spectroscopy using data of the derivatives 8- 11.
Lieb
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Zentralbereich Zentrale Forschung der Bayer AG, D-5090 Leverkusen, Bundesrepublik Deutschland.
Nonfon
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Wachendorff-Neumann
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U
Wendisch
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