使用电性距离矢量(Mt)描述10种三唑噻吩嘧啶衍生物的化学结构。通过最佳变量子集回归建立其对小麦赤霉菌抑制活性(G)与Mt的最佳一元数学模型(QSAR),其判定系数(R2)及逐一剔除法的交叉验证相关系数(R2cv)分别为0.854、0.798。经R2cv、F等检验,该模型具有良好的稳健性及预测能力。根据进入此模型的M36可知,影响三唑噻吩嘧啶衍生物对小麦赤霉菌抑制活性的主要因素是分子的二维结构特征>CHf-和F-等结构碎片。
The electronegativity distance vector( Mt) was used to describe the chemical structures of 10 triazolthieno-pyrimidin derivatives. The quantitative structure-activity relationships( QSAR) was established by using leaps-and-bounds regression analysis for the bactericidal activity( G) of above compounds to Gibberella zeae along with the Mt. The traditional correlation coefficient( R2) and the cross-validation correlation coefficient( R2cv) of leave-one-out( LOO) of the optimal one variable( M36) QSAR model were 0. 854 and 0. 798,respectively. The model had both favorable estimation stability and good prediction capability by R2 cv,F tests. M36 in the model showed that the main factor to affect the inhibition activity of triazol-thieno-pyrimidin derivatives was a two-dimensional structural characteristics of the molecular CHf- and F- structure fragments.