Lignan Glycosides from Urena lobata
Yuan Luo, Cong Su, Ning Ding, Bowen Qi, Fangfang Jia, Xiping Xu, Xiao Liu, Juan Wang, Xiaohui Wang, Pengfei Tu, Shepo Shi
Abstract
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Yuan Luo, Cong Su, Ning Ding, Bowen Qi, Fangfang Jia, Xiping Xu, Xiao Liu, Juan Wang, Xiaohui Wang, Pengfei Tu, Shepo Shi
Abstract
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Four new lignan glycosides; urenalignosides A–D (1–4), along with 12 known ones (5–16) were isolated from Urena lobata. Their structures were determined on the basis of extensive spectroscopic and spectrometric data (1D and 2D NMR; IR; CD; and HRESIMS). Compounds 2–4; 6; 7; 10; and 11 showed inhibition of nitric oxide production in lipopolysaccharide-induced RAW 264.7 macrophage cells with IC50 values in the range of 25.5–98.4 μM (positive control; quercetin; IC50 = 7.2 ± 0.2 μM).
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Four new lignan glycosides; urenalignosides A–D (1–4), along with 12 known ones (5–16) were isolated from Urena lobata. Their structures were determined on the basis of extensive spectroscopic and spectrometric data (1D and 2D NMR; IR; CD; and HRESIMS). Compounds 2–4; 6; 7; 10; and 11 showed inhibition of nitric oxide production in lipopolysaccharide-induced RAW 264.7 macrophage cells with IC50 values in the range of 25.5–98.4 μM (positive control; quercetin; IC50 = 7.2 ± 0.2 μM).
Key concepts: Glycoside, Lignan, Chemistry, Stereochemistry