Isolation, Structure Determination, and Semisynthesis of Diphenazine Compounds from a Deep-Sea-Derived Strain of the Fungus <i>Cystobasidium laryngis</i> and Their Biological Activities
作者:Hwa-Sun Lee、Jong Soon Kang、Duk-Yeon Cho、Dong-Kug Choi、Hee Jae Shin
DOI:10.1021/acs.jnatprod.1c00985
日期:2022.4.22
material for biological testing. During the purification of semisynthetic 6, a side product 9 was obtained from the reaction mixture along with 6. Compounds 1–6, along with previously reported 7 and 8, were assessed for anti-neuroinflammatory activity in LPS-induced BV-2 microglia cells. Compound 6 exhibited the highest anti-neuroinflammatory effect with an IC50 value of 0.30 μM, but it showed cytotoxicity
从印度洋海脊深海沉积物中的Cystobasidium laryngis菌株的培养液的 EtOAc 提取物中分离出六种新的苯那嗪衍生物Phenazostatins E - J ( 1-6 )。基于 HRESIMS 和 1D 和 2D NMR 光谱阐明了1-6的结构。除了3和6之外, 1 – 6的绝对构型是通过改进的 Mosher 方法、ECD 数据分析和旋光值计算确定的。3和6的绝对配置通过化学衍生化鉴定,并将比旋转值与通过1和大环酸 ( 7 )氧化获得的半合成3进行比较。非那唑他汀 J ( 6 ) 使用紫杉酸 ( 7 )半合成,以制备用于生物测试的额外材料。在半合成物6的纯化过程中,从反应混合物中得到副产物9以及6。化合物1 – 6以及先前报道的7和8,评估了 LPS 诱导的 BV-2 小胶质细胞中的抗神经炎症活性。化合物6表现出最高的抗神经炎症作用,IC 50值为0.30 μM,但在高于1