Inhibitors of Adenosine 3', 5'-Cyclic Monophosphate Phosphodiesterase from Schisandra chinensis and the Structure Activity Relationship of Lignans

Abstract

The structure activity relationship was studied in analogous lignans from Schisandra chinensis and their derivatives. These compounds were tested for cyclic adenosine 3', 5'-monophosphate (cAMP) phosphodiesterase inhibition. An inhibitor, nordihydroguaiaretic acid (13), was isolated from this plant, so we discussed this compound and a derivative, nordihydroguaiaretic acid tetramethyl ether, using molecular mechanics involving three-dimensional modeling and minimization of the structure using the MM2PP program. As a result, it was found that the structure of nordihydroguaiaretic acid tetrametyl ether and papaverine (30) (positive control) shared a similar low energy conformation. This fact suggested that these compounds inhibited cAMP phosphodiesterase by a similar mechanism.