期刊
JOURNAL OF NATURAL PRODUCTS
卷 70, 期 10, 页码 1628-1631出版社
AMER CHEMICAL SOC
DOI: 10.1021/np070342j
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Four new Daphniphyllum alkaloids, daphnipaxianines A-D (1-4), along with six known ones, have been isolated from the leaves and fruits of Daphniphyllum paxianum. Daphnipaxianines A and B (1, 2), a pair of epimers differing at C-10, are the first caliciphylline A type Daphniphyllum alkaloids with a Delta(9(15)))-unsaturated cyclic ketone unit, and daphnipaxianine D (4) is the first yuzurine-type Daphniphyllum alkaloid containing a hexacyclic ring system. The structures of these alkaloids were characterized by spectroscopic methods, especially 2D NMR techniques. A single-crystal X-ray diffraction analysis was used to confirm the structure of 1.
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