【摘要】 从甘西鼠尾草根中分离、人工制备及由动物体内外代谢后得到的 2 3个二萜醌类化合物对金黄色葡萄球菌进行抑菌活性研究 ,采用多重回归方法 ,建立了以结构片段为指示变量的Free- Wilson方程式 ,研究了该类化合物的抗菌构效关系。结果表明 :醌式基团是抑菌作用的必须基团 ,邻醌的抑菌强度大于对醌 ;分子中 D环 C15与 C16 之间为单键时 ,可增加抑菌作用 ;分子A环为脂肪环时 ,可增强抑菌活性 ;分子 D环 C15位含氮取代基时可增强抑菌活性 ;A环的羟基化或环内脱氢均导致抑菌活性下降。此结论为鼠尾草二萜醌类化合物的抗菌新药研制提供了理论依据。更多还原

【Abstract】 The antibacterial (staphyloccocus aureus) activities of 23 diterpene quinones from the Salvia przewalskii Maxim, the artificial synthesis and the metabolism in pigs were examined in an effort to study the quantitative structure activity relationship with the Free Wilson methods.With the application of the multiply regression, the Free Wilson pattern was established by the dummy(indicator) variable of the structural fragments or substituents.The results showed: (1) The diketone moiety was the fundamental role in the activities, ortho quinones was higher active than para quinones. (2) The single bond existed between the C 15 and C 16 at D ring led to higher activity. (3) The saturation at the A ring led to higher activity. (4) The components adjacent to nitrogen substituents at C 15 led to higher activity. (5) The hydroxylation or dehydrogenation at A ring led to less activity.更多还原