New humantenine-type indole alkaloids with iridoid unit from Gelsemium species |
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| Authors: | Noriyuki Kogure Naoko Ishii Sumphan Wongseripipatana |
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| Affiliation: | a Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
b Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10500, Thailand |
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| Abstract: | Two new oxindole alkaloids, rankiniridine (1) and humanteniridine (2), having a nitrogen-carbon linkage between a humantenine-type monoterpenoid indole alkaloid and a monoterpene unit with an iridoid skeleton, were isolated from Gelsemium rankinii and Gelsemium elegans, respectively. |
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| Keywords: | Indole alkaloid Gelsemium Iridoid Structure elucidation |
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