as a minor component. Gymnastatin N (1) was found to be a 52:48 mixture of (1S,6′R) and (1R,6′R) diastereomers, by synthesis of the four possible diastereomers and comparison of the optical rotation and chiral HPLC profile of each diastereoisomer with the natural product. Analogues of 1 were synthesized and evaluated against the Plk1 assay and these SAR studies suggested that the diene and free carboxylic
针对POLO样激酶1(Plk1)(一种抗癌靶标)的高通量筛选,鉴定了一种来自点状真菌Arachniotus punctatus的活性
提取物。
生物测定指导的分馏导致分离出新的
天然产物gymaststatin N(1)和已知的化合物阿诺洛糖醇A(2),IC 50值分别为13和118μM 。分离出
金格他汀N,3的12'-羟基类似物作为次要成分。Gymnastatin N(1)被认为是(1的52:48混合物小号,6' - [R )和(1 - [R,6' - [R)非对映异构体,可以合成四种可能的非对映异构体,并比较每种非对映异构体与
天然产物的旋光度和手性HPLC谱。合成了类似物1并针对Plk1分析进行了评估,这些
SAR研究表明,二烯和游离
羧酸部分可能是其
生物活性的原因。