Structural determination of quercusides A and B, new flavonoid glucosides from<i>Quercus incana</i>, by 1D and 2D NMR spectroscopy
作者:Benish Iftikhar、Shagufta Perveen、Abdul Malik、Najma Sultana、Saeed Arayne、Pir Muhammad
DOI:10.1002/mrc.2426
日期:2009.7
Quercusides A and B, new flavonoid glucosides have been isolated from the chloroform soluble fractions of Quercus incana. Their structures were assigned from (1)H and (13)C nuclear magnetic resonance spectra, distortionless enhancement by polarization transfer (DEPT) and by correlation spectroscopy, heteronuclear multiple quantum correlation (HMQC) and heteronuclear multiple bond correlation (HMBC)
从栎栎的氯仿可溶级分中分离出栎属A和B,新的类黄酮苷。它们的结构由(1)H和(13)C核磁共振光谱,通过极化转移(DEPT)和相关光谱进行的无畸变增强,异核多量子相关性(HMQC)和异核多键相关性(HMBC)实验指定。紫杉醇,β-谷甾醇和熊果酸也已从该物种中报道。