Abstract
One new 6,7-seco-ent-kaurane diterpenoid, sculponin T (1), was isolated from the aerial parts of Isodon sculponeatus, along with four known analogs, sculponeatin J (2), sculponeatin K (3), sculponeatin C (4), and sculponeatin Q (5). Their structures were elucidated by extensive spectroscopic analysis and by comparison with data reported in the literature. Significant cytotoxic activity was observed for compound 2 against five human tumor cell lines with IC50 values ranging from 1.8 mu mol/L to 3.31 mu mol/L, and it also inhibited NO production in LPS-stimulated RAW264.7 cells, with IC50 value of 3.3 mu mol/L. (C) 2014 Jian-Xin Pu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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