Fig. 7From: Isolation, bioassay and 3D-QSAR analysis of 8-isopentenyl flavonoids from Epimedium sagittatum maxim. as PDE5A inhibitorsPredicted activities (PA) by CoMFA (A) and CoMSIA (B) models versus experimental activities (EA). Black filled square, compounds of the training set; red filled traingle, compounds of the test setBack to article page