Molecular structure of tuberostemonone |
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Authors: | Wen -Han Lin Ren -Sheng Xu Ru -Ji Wang Thomas C W Mak |
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Institution: | (1) Shanghai Institute of Materia Medica, Academia Sinica, 319 Yueyang Road, 200031 Shanghai, China;(2) Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong |
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Abstract: | A newstemona alkaloid, tuberostemonone (C22H31NO6), has been isolated from the roots ofstemona tuberosa Lour, and its molecular structure determined by MS, IR, NMR spectra and X-ray crystallography (R=0.046 for 1746 observed Mo-K data). Besides retaining the characteristicstemona skeleton, which is composed of an-methyl--lactone and anN-methylene azepine ring linked at the -position of this lactone, the tuberostemonone molecule possesses a nine-membered azacycle which is hitherto not found in other knownstemona alkaloids.On leave from Central Laboratory, Nankai University, Tianjin, China. |
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