Four novel gelsenicine-related oxindole alkaloids from the leaves of Gelsemium elegans benth |
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Authors: | Kogure Noriyuki Ishii Naoko Kitajima Mariko Wongseripipatana Sumphan Takayama Hiromitsu |
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Institution: | Graduate School of Pharmaceutical Sciences, Chiba University, Inage-ku, Japan. |
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Abstract: | reaction: see text] New types of four gelsenicine-related oxindole alkaloids were isolated from the leaves of Gelsemium elegans Benth. Gelsedilam (1) and 14-acetoxygelsedilam (2) are the first examples of 18,19-nor-type monoterpenoid indole alkaloids. Gelsefuranidine (3) and gelseiridone (4) have, respectively, an additional furan residue or an iridoid unit on the gelsenicine-related monoterpenoid indole alkaloid. |
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