Diketopiperazine-Type Alkaloids from a Deep-Sea-Derived <i>Aspergillus puniceus</i> Fungus and Their Effects on Liver X Receptor α
作者:Xiao Liang、Xuelian Zhang、Xinhua Lu、Zhihui Zheng、Xuan Ma、Shuhua Qi
DOI:10.1021/acs.jnatprod.9b00055
日期:2019.6.28
analyses, and their absolute configurations were determined by Marfey's method along with comparison of their specific rotations and ECD spectra. The absolute configurations of 4 and 5 were further confirmed by a single-crystal X-ray diffraction analysis. Compounds 1-8 showed significant transcriptional activation of liver X receptor α with EC50 values of 1.7-50 μM, and 7 and 8 were the most potent
八种新的二酮哌嗪类生物碱,其中包括四种含氧杂环丁烷的二酮哌嗪类生物碱,草氧pin酰胺HK(1-4)和四种4-喹唑啉酮生物碱,puniceloids AD(5-8),以及两种已知的类似物(9和10),从深海来源的真菌Aspergillus puniceus SCSIO z021的培养液提取物中分离得到。通过光谱分析阐明了它们的结构,并且通过Marfey方法以及它们的比旋光度和ECD光谱的比较确定了它们的绝对构型。通过单晶X射线衍射分析进一步证实了4和5的绝对构型。化合物1-8显示出肝X受体α的显着转录激活,EC50值为1.7-50μM,而7和8是最有效的激动剂。