A Zwitterionic Alkaloid, Containing a Ra
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Xian-Wen Gan; Hai-Yun Bai; Qi-Gang Chen; Lei Ma; Li-Hong Hu
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Article
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2006
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John Wiley and Sons
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English
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A new Daphniphyllum alkaloid daphnicyclidin L (1), containing a rare cyclopentadienyl anion, which is stabilized as a zwitterion by an internal iminium counterion, was isolated from the stem barks of Daphniphyllum macropodum Miq., together with four known alkaloids: daphnicyclidin D (2), daphnicycli