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The influences on antioxidant activities of the substituents () on benzo ring in 4-Methyl-2H-benzopyran-2-one analogues (1-23) were discussed quantitatively using three dimensional quantitative structure-activity relationships (3D-QSARs: Comparative molecular field analyses (CoMFA) and Comparative molecular similarity indice analyses (CoMSIA)) methods. The statistical qualities of CoMSIA models were better than those of CoMFA models and the CoMSIA 2 model was optimized model (

The Influence of the Substituents on the Benzo Ring for Antioxidant Activity of 4-Methyl-2H-benzopyran-2-one Analogues