娃儿藤内生真菌Talaromyces purpurogenus次生代谢产物研究

Investigation on secondary metabolites of endophytic fungus Talaromyces purpurogenus hosted in Tylophora ovate

通过硅胶柱色谱、中压ODS柱色谱和反相HPLC等多种色谱方法对娃儿藤内生真菌Talaromyces purpurogenus的次生代谢产物进行系统分离,运用NMR,MS,CD和旋光等现代波谱技术进行结构鉴定,共分离鉴定了8个化合物:(R)-2-[5-(methoxycarbonyl)-4-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]acetic acid (1),(3S,4R)-3,4-dihydro-3,4-epoxy-5-hydroxynaphthalen-1(2H)-one (2),(-)-mitorubrinol (3),(-)-mitorubrin (4),(±)-asperlone A (5),terreusinone (6),verrucisidinol (7)和cerebroside C (8)。化合物1和2是新化合物。体外抗糖尿病试验结果显示,化合物1在浓度为10μmol·L-1时,对XOD酶的抑制率为69.9%。

Eight compounds,(R)-2-[5-(methoxycarbonyl)-4-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]acetic acid(1),(3S,4R)-3,4-dihydro-3,4-epoxy-5-hydroxynaphthalen-1(2H)-one(2),(-)-mitorubrinol(3),(-)-mitorubrin(4),(±)-asperlone A(5), terreusinone(6), verrucisidinol(7) and cerebroside C(8) were isolated from the endophytic fungus Talaromyces purpurogenus by using various column chromatographic techniques. Their structures were identified by NMR, MS, CD and optical rotation. Compounds 1 and 2 were new compounds. Their anti-diabetic activities in vitro were evaluated, and compound 1 showed moderate inhibitory activity toward XOD at 10 μmol·L-1 with the inhibition rate of 69.9%.