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目的:分离并鉴定大叶白蜡树皮的化学成分。方法:采用乙醇提取、硅胶柱色谱层析、制备薄层色谱等方法分离样品,所得单体通过紫外光谱、红外光谱、核磁共振及质谱等波谱分析法确定结构。结果:从样品中分得11个化合物,分别为咖啡酸(1)、丁香醛(2)、槲皮素(3)、槲皮素-3-O-β-D-葡萄糖苷(4)、木犀草素-7-O-β-D-葡萄糖苷(5)、黄芩素(6)、槲皮素-3-O-α-L-鼠李糖苷(7)、丁香苷(8)、木犀草素(9)、汉黄芩素(10)、芦丁(11)。其中化合物3、4、5、6、7、9、10均为首次从该属植物中分得。结论:本试验结果可为大叶白蜡树的进一步研究提供试验依据。
OBJECTIVE: To isolate and identify the chemical constituents of the large-leaved ash bark. Methods: The samples were separated by ethanol extraction, silica gel column chromatography and preparative thin layer chromatography. The structures of the obtained monomers were determined by UV spectroscopy, infrared spectroscopy, nuclear magnetic resonance and mass spectrometry. RESULTS: Eleven compounds were isolated from the samples, which were caffeic acid (1), syringaldehyde (2), quercetin (3), quercetin-3-O-β-D-glucoside Luteolin-7-O-β-D-glucoside (5), baicalein (6), quercetin -3-O-α-L-rhamnoside (7), syringin (8) Hormone (9), Wogonin (10), rutin (11). Among them, compounds 3, 4, 5, 6, 7, 9 and 10 were isolated from this genus for the first time. Conclusion: The results of this test can provide experimental basis for the further study of the large-leaf ash tree.