期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 3, 期 10, 页码 1824-1829出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200800021
关键词
alkaloids; natural products; structure elucidation; terpenoids; X-ray diffraction
资金
- National Natural Science Foundation [30630072, 30721005]
Five new alkaloids, gelseganines A-D (1-4) and humantenine N-4-oxide (5), were isolated from the stems and leaves of Gelsemium elegans. Compounds 1-4 represent a rare class of monoterpenoid indole alkaloids that bear an N-4-iridoid unit. The structures of 1-5 were determined by spectroscopic analysis, single-crystal X-ray diffraction, and chemical correlation, and their absolute configurations were elucidated by CD analysis. A plausible biogenetic pathway for alkaloids 1-5 was also postulated.
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