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- W2007016379 abstract "Aus dem komplexen Rohbasengemisch von Zizyphus mucronata Willd. werden durch mehrstufige Chromatographie drei Alkaloide rein isoliert, deren Struktur (1–3) durch Kombination chemischer Umwandlungs- und Abbaureaktionen mit spektroskopischen Untersuchungen geklart wird. Die massenspektrometrische Fragmentierung dieser Verbindungen erlaubt eine Sequenzbestimmung des Peptid-Teils (a–e). Im Gegensatz zu allen bisher bekannten cyclischen Peptid-Alkaloiden ist bei 1–3 fur den Ringschlus nicht eine Atherbrucke, sondern eine beidseitig amidartig verknupfte 3-[N-Methyl- bzw. N.N-Dimethyl-3-alaninyl]-4-methoxy-styrylamin-Einheit verantwortlich.Alkaloids from Rhamnaceae, XII1). – Mucronine-A, -B, and -C, Peptide Alkaloids with a New Type of Structure, Isolated from Zizyphus mucronata WilldFrom the complex mixture of bases from Zizyphus mucronata Willd., three alkaloids have been isolated by means of multi-stage chromatography. Their structures (1–3) are elucidated by a combination of chemical transformation and degradation reactions together with spectroscopic investigations. The mass spectrometric fragmentation pattern of these compounds allows the sequence of the peptide moiety (a–e) to tbe determined. In contrast to all other cyclic peptide alkaloids hitherto known which contain an ether linkage, the ring system in 1–3 is formed by a 3-[N-methyl- or N.N-dimethyl-3-alaninyl]-4-methoxy-styrylamine unit." @default.
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- W2007016379 date "1972-08-22" @default.
- W2007016379 modified "2023-10-09" @default.
- W2007016379 title "Alkaloide aus Rhamnaceen, XII. Mucronin-A, -B und -C, Peptid-Alkaloide eines neuen Strukturtyps ausZizyphus mucronata Willd" @default.
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- W2007016379 doi "https://doi.org/10.1002/jlac.19727590116" @default.
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