Versiquinazolines A–K, Fumiquinazoline-Type Alkaloids from the Gorgonian-Derived Fungus <i>Aspergillus versicolor</i> LZD-14-1
作者:Zhongbin Cheng、Lanlan Lou、Dong Liu、Xiaodan Li、Peter Proksch、Sheng Yin、Wenhan Lin
DOI:10.1021/acs.jnatprod.6b00801
日期:2016.11.23
structures were determined by extensive analyses of the spectroscopic data (1D and 2D NMR, HRESIMS), in addition to the experimental and calculated ECD data and X-ray single-crystal diffraction analysis for the assignments of the absolute configurations. Versiquinazolines A, B, and F (1, 2, and 6), bearing a methanediamine or an aminomethanol unit and representing a unique subtype of fumiquinazolines, were
十一fumiquinazoline型生物碱,即,versiquinazolines A-K(1 - 11),与cottoquinazolines B-d一起,被从柳衍生真菌分离杂色曲霉LZD-14-1。通过对光谱数据(1D和2D NMR,HRESIMS)进行广泛的分析,确定了它们的结构,此外还对实验和计算的ECD数据和X射线单晶衍射分析进行了绝对构型的分配。Versiquinazolines A,B,和F(1,2,和6)是首次从自然界中发现的,带有甲二胺或氨基甲醇单元,代表氟喹唑啉的独特亚型。推测了维西喹唑啉可能的生物遗传关系。此外,库托喹唑啉B(12),D(13)和C(14)的结构应修改为对映体。化合物1,2,7和11表现出对硫氧还蛋白还原酶的抑制活性(IC 50个值范围为12至20微米)。