Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5274850 | Tetrahedron Letters | 2008 | 4 Pages |
Abstract
Bisjaponins A (1) and B (2), two new dimeric ent-kaurane diterpenoids connected with a rare four-membered carbon ring, which was formed by [2+2] reaction, were isolated from the aerial parts of Isodon japonicus. Their structures were elucidated by the analysis of spectroscopic evidence including extensive 2D NMR and MS data. Both the compounds were inactive for their cytotoxicity against human tumor cell lines, K562 and HepG2.
Keywords
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Li-Bin Yang, Jing Yang, Li-Mei Li, Chun Lei, Yong Zhao, Sheng-Xiong Huang, Wei-Lie Xiao, Quan-Bin Han, Jian-Xin Pu, Han-Dong Sun,