A new cyclohexapeptide, penitropeptide and a new polyketide, penitropone from the endophytic fungus Penicillium tropicum
作者:Yanbo Zeng、Hao Wang、Ramsay S.T. Kamdem、Raha S. Orfali、Haofu Dai、Gamall Makhloufi、Christoph Janiak、Zhen Liu、Peter Proksch
DOI:10.1016/j.tetlet.2016.05.095
日期:2016.7
The first chemical investigation of the endophytic fungus Penicillium tropicum isolated from leaves of Sapium ellipticum afforded a new cyclohexapeptide, penitropeptide (1), and a new polyketide, penitropone (2), in addition to two known compounds, 6-hydroxy-8-methoxy-3S,5-dimethyl-3,4-isocoumarin (3) and adametizine B (4). Their structures were unambiguously elucidated on the basis of 1D and 2D NMR
首次化学研究从玫瑰树的叶中分离出的内生真菌热带青霉提供了一种新的环六肽,戊对肽(1)和一种新的聚酮化合物,对戊二酮(2),此外还提供了两种已知的化合物6-羟基-8-甲氧基-3 S,5-二甲基-3,4-异香豆素(3)和adametizine B(4)。在1D和2D NMR光谱以及质谱的基础上,并与文献进行比较,明确阐明了它们的结构。这两种新化合物1和2的绝对构型分别通过Marfey方法和X射线单晶衍射确定。测试所有分离的化合物的细胞毒性和抗菌活性。但是,它们均未显示出明显的活性。