Paratunamides A−D, Oxindole Alkaloids from Cinnamodendron axillare
Journal of Natural Products2006Vol. 69(10), pp. 1517–1521
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Toshinori Kagata, Shizuka Saito, Hideyuki Shigemori, Ayumi Ohsaki, Haruaki Ishiyama, Takaaki Kubota, Jun’ichi Kobayashi
Abstract
Four new oxindole alkaloids, paratunamides A-D (1-4), containing a secologanin unit, were isolated from the bark of Cinnamodendron axillare, and their structures and relative configurations were elucidated by spectroscopic data. The absolute configuration at C-7 in 1-4 was assigned as S, S, R, and S, respectively, on the basis of the CD spectra.
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