Diterpenoids from Isodon sculponeatus |
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| Institution: | 1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, People''s Republic of China;2. University of the Chinese Academy of Sciences, Beijing 100049, People''s Republic of China |
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| Abstract: | Phytochemical investigation of the aerial parts of Isodon sculponeatus afforded six new 7,20-epoxy-ent-kauranoids, sculponins U–Z (1–6), and 11 known diterpenoids (7–17). The structures of these new compounds were elucidated primarily by means of extensive spectroscopic analysis, and the absolute configuration of 1 was determined by single crystal X-ray diffraction. Compound 5 exhibited weak cytotoxic activity against HL-60, SMMC-7721, MCF-7, and SW-480 cell lines, and it also inhibited NO production in LPS-stimulated RAW264.7 cells, with IC50 value of 13.8 μM. |
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