Phosphodiesterase-1 Inhibitory Activity of Two Flavonoids Isolated from Pistacia integerrima J. L. Stewart Galls

Figure 4

2D (left) and 3D (right) models of 3,5,7,4′-tetrahydroxy-flavanone (2) in the binding site of PDE1. Green lines indicate hydrogen bonds and the half-moon the hydrophobic interactions.

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