Two new natural products from the fruits of Alpinia oxyphylla with inhibitory effects on nitric oxide production in lipopolysaccharide-activated RAW264.7 macrophage cells
作者:Zhang Jun Qing、Wang Yong、Li Yong Hui、Lai Wei Yong、Li Hai Long、Duan Jin Ao、Pei Li Xia
DOI:10.1007/s12272-012-1211-7
日期:2012.12
Chemical investigation of the fruits of Alpinia oxyphylla led to an isolation of the two new natural products, 9-hydroxy epinootkatol (1) and (S)-2-pentanol-2-O-β-D-glucopyranoside (2), in addition to the nine known compounds, pinocembrin (3), tectochrysin (4), izalpinin (5), nookatone (6), yakuchinone A (7), protocatechuic acid (8), β-sitosterol (9), daucosterol (10) and β-sitosterol palmitate (11). Their structures were elucidated on the basis of physicochemical constants and NMR spectral data analysis. The effects of the isolated components on nitric oxide production in LPS-induced RAW 264.7 macrophages were examined. The two new natural compounds showed inhibitory activities with IC50 values of 21.8 and 32.8 μg/mL, respectively.
通过对 Alpinia oxyphylla 果实进行化学研究,我们分离出了两种新的天然产物:9-羟基 epinootkatol (1) 和 (S)-2-pentanol-2-O-β-D-glucopyranoside (2)、此外,还有九种已知化合物:pinocembrin (3)、tectochrysin (4)、izalpinin (5)、nookatone (6)、yakuchinone A (7)、protocatechuic acid (8)、β-谷甾醇 (9)、daucosterol (10) 和 β-谷甾醇棕榈酸酯 (11)。根据理化常数和核磁共振光谱数据分析阐明了它们的结构。研究了分离成分对 LPS 诱导的 RAW 264.7 巨噬细胞产生一氧化氮的影响。这两种新的天然化合物具有抑制活性,其 IC50 值分别为 21.8 和 32.8 μg/mL。