Cyclic Diarylheptanoids from <i>Corylus avellana</i> Green Leafy Covers: Determination of Their Absolute Configurations and Evaluation of Their Antioxidant and Antimicrobial Activities
作者:Antonietta Cerulli、Gianluigi Lauro、Milena Masullo、Vincenza Cantone、Beata Olas、Bogdan Kontek、Filomena Nazzaro、Giuseppe Bifulco、Sonia Piacente
DOI:10.1021/acs.jnatprod.6b00703
日期:2017.6.23
geographical indication) product “Nocciola di Giffoni”, afforded two new cyclic diarylheptanoids, giffonins T and U (2 and 3), along with two known cyclic diarylheptanoids, a quinic acid, flavonoid-, and citric acid derivatives. The structures of giffonins T and U were determined as highly hydroxylated cyclic diarylheptanoids by 1D and 2D NMR experiments. Their relative configurations were assigned
意大利PGI(受保护的地理标志)产品“ Nocciola di Giffoni”的来源-欧洲榛子叶盖的甲醇提取物,提供了两个新的环状二芳基庚烷类,giffonins T和U(2和3),以及两个已知的环状二芳基庚烷类,奎宁酸,类黄酮和柠檬酸衍生物。通过1D和2D NMR实验确定了giffonins T和U的结构为高度羟基化的环状二芳基庚烷。通过组合的量子力学/ NMR方法分配了它们的相对构型,比较了实验13 C / 1 H NMR化学位移数据和相关的预测值。Carpinontriol B(1的绝对构型)和giffonins T和U(2和3)是通过将它们的实验电子圆二色性曲线与TDDFT预测的曲线进行比较来指定的。通过测量硫代巴比妥酸反应性物质的浓度来确定化合物抑制H 2 O 2和H 2 O 2 / Fe 2+诱导的脂质过氧化的能力。此外,紫花苜蓿叶覆盖物的甲醇提取物和分离出的化合物对革兰氏阳