Paratunamides A−D, Oxindole Alkaloids from Cinnamodendron axillare
- Toshinori Kagata ,
- Shizuka Saito ,
- Hideyuki Shigemori ,
- Ayumi Ohsaki ,
- Haruaki Ishiyama ,
- Takaaki Kubota , and
- 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.
†
Hokkaido University.
§
University of Tsukuba.
‡
Tokyo Medical and Dental University.
*
Corresponding author. Tel: +81-11-706-3239. Fax: +81-11-706-4989. E-mail: [email protected]
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