New heteroyohimbine-type oxindole alkaloid from the leaves of Thai Mitragyna hirsuta |
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| Authors: | Mariko Kitajima Terumi Nakayama Noriyuki Kogure Sumphan Wongseripipatana Hiromitsu Takayama |
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| Affiliation: | (1) Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan;(2) Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, 10500, Thailand |
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| Abstract: | A new oxindole alkaloid, isomitraphyllinol (1), was isolated from the leaves of Thai Mitragyna hirsuta, together with five known oxindole alkaloids (2–6). The structure of the new compound was determined by spectroscopic analysis. |
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| Keywords: | Mitragyna hirsuta Rubiaceae Alkaloid Indole Oxindole Structure determination |
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