期刊
TETRAHEDRON
卷 64, 期 33, 页码 7690-7694出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.06.030
关键词
Gelsemium; alkaloid; gelsedine; gelsenicine; gelsecrotonidine; gelsedilam
Four new gelsedine-type oxindole alkaloids (1-4) were isolated from the leaves and branches of Gelsemium elegans, together with 10 known alkaloids. The structures of the new alkaloids were determined by spectroscopic analyses and partial synthesis from known compounds. Gelsecrotonidine (1), 14-hydroxygelsecrotonidine (2), and 11-methoxygelsecrotonidline (3) possess an additional C(2) unit with an acetic acid residue compared to gelsenicine-related monoterpenoid indole alkaloids. 14-Hydroxygelsedilam (4) is an 18,19-nor-type monoterpenoid indole alkaloid. (C) 2008 Elsevier Ltd. All rights reserved.
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