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Chemical Constituents from the Flower of Hosta plantaginea with Cyclooxygenases Inhibition and Antioxidant Activities and Their Chemotaxonomic Significance

机译:玉Host花中具有环氧合酶抑制和抗氧化活性的化学成分及其化学分类学意义

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摘要

Two new phenolic glucosides, hostaflavanone A (>1) and anti-1-phenylpropane-1,2-diol-2-O-β-d-glucopyranoside (>2), together with six known compounds, anti-1-phenylpropane-1,2-diol (>3), phenethyl-O-β-d-glucopyranoside (>4), phenethanol-β-d-gentiobioside (>5), phenethyl-O-rutinoside (>6), (1S, 3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (>7), and (1R, 3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (>8), were isolated from the flower of Hosta plantaginea, and their structures were elucidated by nuclear magnetic resonance (NMR), high resolution electrospray ionization mass spectroscopy (HRESIMS), and circular dichroism (CD) analyses. The cyclooxygenases (COX-1 and COX-2) inhibition and antioxidant activities of compounds >1 and >4–>6 were investigated, and they showed moderate cyclooxygenases inhibition activities. Moreover, only compound >1 exhibited moderate antioxidant activity, with an IC50 value of 83.2 μM, while >4–>6 showed insignificant activity with IC50 values of 282, 257, and 275 μM, respectively. This is the first report of compounds >3 and >5–>8 from the Liliaceae family. The chemotaxonomic significance of the isolated compounds was also summarized.
机译:两种新的酚类葡萄糖苷,hostaflavanone A(> 1 )和抗-1-苯基丙烷-1,2-二醇-2-O-β-d-吡喃葡萄糖苷(> 2 ),与六种已知化合物,抗-1-苯基丙烷-1,2-二醇(> 3 ),苯乙基-O-β-d-吡喃葡萄糖苷(> 4 ),苯乙醇- β-d-龙胆苷(> 5 ),苯乙基-O-芸香苷(> 6 ),(1S,3S)-1-甲基-1,2,3,4-四氢-β-咔啉-3-羧酸(> 7 )和(1R,3S)-1-甲基-1,2,3,4-四氢-β-咔啉-3-羧酸(> 8 ),是从植物玉Host(Hosta plantaginea)的花中分离得到的,其结构通过核磁共振(NMR),高分辨率电喷雾电离质谱(HRESIMS)和圆二色性(CD)分析得以阐明。 。研究了化合物> 1 和> 4 – > 6 的环氧合酶(COX-1和COX-2)抑制作用和抗氧化活性,显示中等环氧合酶抑制活性。此外,只有化合物> 1 表现出中等的抗氧化活性,IC50值为83.2μM,而> 4 – > 6 的活性很小,IC50为分别为282、257和275μM。这是来自百合科的化合物> 3 和> 5 – > 8 的第一份报告。还概述了分离出的化合物的化学分类学意义。

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