Table 2. The summary analysis of 3D-QSAR and 3D-QSSR models.

Statistical results	pIC50 (CDK4)	log[IC50 (CDK2)/IC50 (CDK4)]
q2a	0.724	0.742
ONCb	6	5
r2c	0.965	0.923
F valued	186.497	100.497
SEEe	0.148	0.182
r2predf Field contribution	0.945	0.863
Steric/Electrostatic	0.548/0.452	0.444/0.556

^aCross-validated coefficient;

^bOptimal number of components;

^cConventional correlation coefficient;

^dFisher test value;

^eStandard error of estimate;

^fPredictive correlation coefficient.