Table 4. Results of the classification system derived from the Chym comparison method.

Set	Chym			Best previous attempt
	Parameters	MCC	Accuracy	Approach	MCC	Accuracy
BBB	FP3, simGIC, all, 0.29	0.810	90.0%	SVM	0.628	81.5%
P-gp	FP4, simUI, role, 0.72	0.694	87.3%	Random Forests	0.591	80.6%
estrogen	FP4, simGIC, role, 0.45	0.673	82.6%	Random Forests	0.647	82.8%

Chym parameters are “fingerprint format, semantic method, branch of the ontology used, ”. The validation process used was 10-fold. Matthews Correlation Coefficient values reported here was not directly retrieved from the papers where the attempts are described, but were estimated based on the values of true positives, false positives, true negatives and false negatives given in those papers.