Bibenzyl-Based Meroterpenoid Enantiomers from the
Chinese Liverwort Radula sumatrana
Posted on 2017-12-07 - 18:10
Six new pairs of bibenzyl-based meroterpenoid
enantiomers, (±)-rasumatranin
A–D (1–4) and (±)-radulanin
M and N (5 and 6), and six known compounds
were isolated from the adnascent Chinese liverwort, Radula
sumatrana. Their structures were elucidated based on spectroscopic
data and chiral phase HPLC-ECD analyses. The structures of 1 and 7 were also confirmed by single-crystal X-ray diffraction
analysis. Cytotoxicity tests of the isolated compounds showed that
6-hydroxy-3-methyl-8-phenylethylbenzo[b]oxepin-5-one
(8) showed activity against the human cancer cell lines
MCF-7, PC-3, and SMMC-7721, with IC50 values of 3.86, 6.60,
and 3.58 μM, respectively, and induced MCF-7 cell death through
a mitochondria-mediated apoptosis pathway.
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Wang, Xiao; Li, Lin; Zhu, Rongxiu; Zhang, Jiaozhen; Zhou, Jinchuan; Lou, Hongxiang (2017). Bibenzyl-Based Meroterpenoid Enantiomers from the
Chinese Liverwort Radula sumatrana. ACS Publications. Collection. https://doi.org/10.1021/acs.jnatprod.7b00394