Two novel flavonoids from the leaves of <i>Rhododendron dauricum</i> L. with their inhibition of TNF-α production in LPS-induced RAW 264.7 cells
作者:Chao Ye、Mei Jin、Chunshi Jin、Rongshen Wang、Jiaming Wang、Ying Zhang、Sainan Li、Jinfeng Sun、Wei Zhou、Gao Li
DOI:10.1080/14786419.2019.1648455
日期:2021.4.18
4′-O-β-D-glucopyranoside (1) and quercetin 3-O-β-D-(6′′-p-methoxybenzoyl)-galactopyranoside (2), together with ten known flavonoids (3–12) were isolated from the leaves of Rhododendron dauricum L. The structures of the flavonoids were characterized from spectroscopic data (1D and 2D NMR and HR-ESI-MS). The isolated flavonoids were evaluated for their inhibitory effects on the production of tumour necrosis
摘要 两个新的类黄酮(2 S)-6,8-二甲基-5,7,3',4'-四羟基黄酮4'-O- β -D-吡喃葡萄糖苷(1)和槲皮素3-O - β -D-( 6'' - p甲氧基苯甲酰基)-galactopyranoside(2)中,用10种已知的黄酮类化合物(一起3 - 12)从叶中分离兴安杜鹃L.(1D和2D NMR和黄酮类化合物的结构进行了表征从光谱数据HR-ESI-MS)。评估了分离的类黄酮对LPS刺激的RAW 264.7细胞中肿瘤坏死因子(TNF)-α产生的抑制作用。化合物11具有抑制TNF-α产生的活性,IC 50值为46.2±1.2 µM。