Two new sesquineolignans, named dunnianol (1) and isodunnianol (2), respectively, were isolated from the bark of Illicium dunnianum together with the known biphenylneolignan, magnolol (3). Compounds 1 and 2 have a similar triphenyl-type neolignan structure to that of macranthol (4), which we previously isolated from the pericarps of I. macranthum. Their structures were elucidated by means of the detailed analysis of their 1H-and 13C-nuclear magnetic resonance spectra of 1, 2, and their acetylation and methylation products, including two-dimensional NMR spectra, comparing with those of magnolol, isomagnolol and macranthol.
从 Illicium dunnianum 树皮中分离出了两种新的芝麻新
木质素,分别命名为 dunnianol(1)和 isodunnianol(2),以及已知的
联苯新
木质素 magnolol(3)。化合物 1 和 2 与我们之前从 I. macranthum 树皮中分离出的 macranthol(4)具有相似的三苯基新
木质素结构。通过详细分析 1、2 及其乙酰化和甲基化产物的 1H 和 13C 核磁共振波谱,包括二维核磁共振波谱,并与 magnolol、isomagnolol 和 macranthol 的波谱进行比较,阐明了它们的结构。