Flavone-8-acetic acid analoges disrupting Tumour blood vessels were applied to 3D-QSAR analyses using the comparative molecular field analysis (CoMFA) and comparative molecular similarity index analysis (CoMSIA) methods. Thirty-three compounds were served to establish the predicting models, which were validated by evaluation of the test set of six compounds. The best predictions were obtained with the CoMFA steric, electrostatic fields (q²＝0.621, n＝4, s_press＝0.345, r²＝0.945, s＝0.131, F＝120.455) and with the CoMSIA combined steric and hydrophobic fields (q²＝0.700, n＝5, s_press＝0.312, r²＝0.946, s＝0.133, F＝94.193). With the guidance of the obtained model, some compounds with high activity would be designed.

Key words: vascular disrupting agents, flavone-8-acetic acid, CoMFA, CoMSIA