Further new complex daphniphyllum alkaloids from the stems and leaves of Daphniphyllum calycinum: Structure and stereochemistry

  title={Further new complex daphniphyllum alkaloids from the stems and leaves of Daphniphyllum calycinum: Structure and stereochemistry},
  author={Shou-Mao Shen and Hangfei Li and Jian-rong Wang and Yanbo Zeng and Yue‐Wei Guo},
ABSTRACT Four new daphniphyllum alkaloids, namely daphnicalycines A–D (1–4), together with nineteen known related ones (5–7 and 11–26), were isolated from the stems and leaves of Daphniphyllum calycinum. Their structures including the absolute configurations were unambiguously elucidated by extensive spectroscopic analysis, X-ray diffraction analysis and comparison with the reported data. In particular, with the assistance of X-ray diffraction analysis, we were able not only, for the first time… Expand
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