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This study could show that the potent inhibitor of PDE5 from Epimedium sagittatum components. The PDE 5 inhibitors of data set from Xia's study were calculated their properties. Multiple linear regression analysis was used to build the QSAR model. Those properties were associated to drug activities by the QSAR model. This result showed high correlation (R2 = 0.848) with drug activities in this QSAR...
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