Fig. 8From: Isolation, bioassay and 3D-QSAR analysis of 8-isopentenyl flavonoids from Epimedium sagittatum maxim. as PDE5A inhibitorsCoMFA contour maps of A favorable (green) and unfavorable (yellow) steric field, B electropositive (blue) and electronegative (red) fields. CoMSIA contour maps of C favorable (green) and unfavorable (yellow) steric field, D favorable (yellow) and unfavorable (white) hydrophobic field, E favorable (magenta) and unfavorable (red) hydrogen bond acceptor fieldBack to article page