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1H and 13 C NMR assignments for two lignans from the heartwood of Streblus asper

✍ Scribed by Jun Li; Yan-Jun Zhang; Bai-Feng Jin; Xiao-Jian Su; Yi-Wen Tao; Zhi-Gang She; Yong-Cheng Lin

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
103 KB
Volume
46
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

In our ongoing investigation of the bioactive constituents from plants, two new lignans, magnolignan A‐2‐O‐β‐D‐glucopyranoside and strebluslignanol were isolated from heartwood of Streblus asper, along with three known lignans, magnolignan A, magnolol, and magnaldehyde D. 1D and 2D NMR experiments, including COSY, HMQC, and HMBC, and other spectroscopic methods, including UV, IR, and MS were used for the determination of the structures and NMR assignments. Primary bioassays showed that magnolignan A‐2‐O‐β‐D‐glucopyranoside and strebluslignanol have medium cytotoxic activity against HEp‐2 and HepG2 cells, with IC~50~ of 13.3 µM, 46.4 µM and 10.1 µM, 21.7 µM, respectively. Copyright © 2008 John Wiley & Sons, Ltd.

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