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JOURNAL ARTICLE

neo-Clerodane Diterpenoids from Scutellaria barbata and Their Inhibitory Effects on LPS-Induced Nitric Oxide Production

Eung Tae Yeon, Jin Woo Lee, Chul Lee, Qinghao Jin, Hari Jang, Dongho Lee, Jong Seog Ahn, Jin Tae Hong, Youngsoo Kim, Mi Kyeong Lee, Bang Yeon Hwang
Journal of Natural Products 2015 September 25, 78 (9): 2292-6
26331882
Three new neo-clerodane diterpenoids (1-3) along with 12 known compounds (4-15) were isolated from a methanol extract of the aerial parts of Scutellaria barbata. The structures of 1-3 were determined by interpretation of their 1D and 2D NMR spectroscopic data as well as HRESIMS values. All isolated compounds were tested for their inhibitory effects on LPS-induced nitric oxide production in RAW 264.7 macrophages. Compounds 1-4, 7, and 10-12 were found to inhibit nitric oxide production with IC50 values ranging from 20.2 to 35.6 μM.

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