Diarylheptanoids from Rhizomes of <i>Alpinia officinarum</i> Inhibit Aggregation of α-Synuclein
作者:Guangmiao Fu、Wei Zhang、Dongsheng Du、Yu Pong Ng、Fanny C. F. Ip、Rongbiao Tong、Nancy Y. Ip
DOI:10.1021/acs.jafc.7b02021
日期:2017.8.9
Two new diarylheptanoids, alpinin A (1) and alpinin B (2), together with 18 known diarylheptanoids (3–20), were isolated from the rhizomes of Alpinia officinarum. Their structures were elucidated by comprehensive spectroscopic analysis, including high-resolution mass spectrometry, infrared spectroscopy, and one- and two-dimensional nuclear magnetic resonance spectroscopy. Structurally, alpinin A is
从Alpinia officinarum的根茎中分离出了两个新的二芳基庚烷类化合物,高山素A(1)和高山素B(2),以及18种已知的二芳基庚烷化合物(3至20)。通过全面的光谱分析,包括高分辨率质谱,红外光谱以及一维和二维核磁共振光谱,阐明了它们的结构。从结构上讲,alpinin A是氧杂桥联的二芳基庚烷小家族的新成员,并含有特征性的2,6-顺式构型的四氢吡喃基序(C 1 –C 5oxa桥)。通过对映异构体(ent - 1)的不对称全合成证实了alpinin A的绝对构型,证实了分子结构的分配。在对圆二色性激子手性光谱进行分析的基础上,确定了阿尔卑斯素B的绝对构型。我们评估了所有分离的二芳基庚烷类化合物在10μM时对α-突触核蛋白聚集的抑制活性。Alpinins A和B分别显着抑制α-突触核蛋白聚集66%和67%。