Choudhary M Iqbal, Naheed Nadra, Abbaskhan Ahmed, Musharraf Syed Ghulam, Siddiqui Hina
H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.
Phytochemistry. 2008 Feb;69(4):1018-23. doi: 10.1016/j.phytochem.2007.10.028. Epub 2008 Jan 4.
Two glycosides, 6'-O-(3,4-dihydroxy benzoyl)-beta-D-glucopyranosyl ester (1), and 4-O-beta-d-glucopyranoside-3-hydroxy methyl benzoate (2), along with five known compounds methyl benzoate (3), hypogallic acid (4), caffeic acid (5), paeoniflorin (6) and pikuroside (7) were isolated for the first time from a fresh water fern Salvinia molesta D.S. Mitch. These compounds showed a potent antioxidant radical scavenging activity in a non-physiological assay. Their structures were determined by NMR spectroscopic and CID mass spectrometry techniques.
从淡水蕨类植物槐叶苹（Salvinia molesta D.S. Mitch.）中首次分离出两种糖苷，6'-O-(3,4-二羟基苯甲酰基)-β-D-吡喃葡萄糖苷酯（1）和4-O-β-D-吡喃葡萄糖苷-3-羟基苯甲酸甲酯（2），以及五种已知化合物苯甲酸甲酯（3）、次没食子酸（4）、咖啡酸（5）、芍药苷（6）和苦库苷（7）。这些化合物在非生理测定中表现出强大的抗氧化自由基清除活性。它们的结构通过核磁共振光谱和碰撞诱导解离质谱技术确定。
