Subincanadines A-C,novel quaternary indole alkaloids from Aspidosperma subincanum |
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Authors: | Kobayashi Jun'ichi Sekiguchi Mitsuhiro Shimamoto Sayaka Shigemori Hideyuki Ishiyama Haruaki Ohsaki Ayumi |
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Institution: | Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan. jkobay@pharm.hokudai.ac.jp |
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Abstract: | Three novel quaternary indole alkaloids with an unprecedented 1-azoniatricyclo4.3.3.0(1,5)]undecane moiety, subincanadines A-C (1-3), as well as two new indole alkaloids with a 1-azabicyclo5.2.2]undecane moiety, subincanadines D (4) and E (5), and a new indole alkaloid with a 1-azabicyclo4.3.1]decane moiety, subincanadine F (6), have been isolated from the barks of Aspidosperma subincanum Mart, and the structures of 1-6 and the stereochemistry of 1-3 were elucidated by spectroscopic data and chemical means. |
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