Two new ent-kaurane diterpenes from the stems of Eurya chinensis |
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| Authors: | Jia-Ling Song Yao Yuan Ling-Hui Nie Bai-Lin Li Xu-Bing Qin Yan Li |
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| Affiliation: | 1. Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;2. College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;3. College of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China |
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| Abstract: | AbstractTwo new ent-kaurane diterpenes (1–2), together with five known analogs, were isolated from the stems of Eurya chinensis. The structures of new compounds were established by extensive analysis of mass spectrometric and 1D and 2D NMR spectroscopic data. Compound 3 exhibited noticeable anti-inflammatory activity as denoted by inhibiting LPS-induced nitric oxide (NO) production in RAW264.7 cells with an IC50 value of 7.82 μM. Compound 4 showed potent cytotoxic activity against human cancer cell lines NCI-H46, HepG2 and SW480 with IC50 values ranging from 7.45 to 8.54 μM. |
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| Keywords: | Theaceae Eurya chinensis diterpene anti-inflammatory cytotoxic activity |
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