摘要:
利用pTLC、硅胶、Sephadex LH-20及半制备HPLC等柱色谱手段,从海洋真菌Penicillium oxalicum SCSGAF 0023的次生代谢产物中分离得到16个化合物,波谱学数据分析鉴定为n-butyl isobutyl terephthalate(1),dibutyl terephthalate(2),1,3,7-trihydroxy-6-methylanthraquinone(3),1,6,7-trihydroxy-3-methoxy-anthraquinone (4),isorhodoptilometrin (5),citreorosein (6),emodin (7),methyl-3,8-dihydroxy-6-methyl-9-oxo-9H-xanthene-1-carboxylate (8),pinselin (9),secalonic acid D(10),quinolactacin C1(11),quinolactacin C2(12),quinolactacin A1 (13),quinolactacin A2 (14),quinolactacin B1(15),3-methyl-IH-indole-2-carboxylic acid (16).其中,化合物1为新天然产物,化合物5和7表现出强的抗草苔虫幼虫附着活性,EC50值分别为3.8和6.0 μ.g/mL;化合物10和15分别对PTPIB和cathepsin B显示中等的酶抑制活性,IC50值分别为24.0和16.0 μM.