OPERA Model Calculation Details: Bioconcentration Factor

Structural image of 3-Chloro-6-phenyl-4-(piperidin-1-yl)-2H-pyran-2-one
Chemical Identifiers
Preferred name: 3-Chloro-6-phenyl-4-(piperidin-1-yl)-2H-pyran-2-one
DTXSID: DTXSID20317440
DTXCID: DTXCID60268563
CASRN: 70486-05-4
Molecular weight: 289.76
Model Results
Model name: OPERA_BCF
Model source: OPERA2.8
Property name: Bioconcentration Factor
Property description: Bioconcentration factor: the ratio of the chemical concentration in fish as a result of absorption via the respiratory surface to that in water at steady state
Experimental value: Experimental value from OPERA2.8
 N/A
Predicted value: Predicted value from the model
58.9 L/kg
Confidence level:  Confidence level is calculated from the accuracy of the predictions of the five nearest neighbors weighted by their distance to the query chemical
0.495
Combined applicability domain:  Combined applicability domain from multiple AD measures
Inside training set (
Global AD  Global applicability domain via the leverage approach
= 1) but poor local representation (
Local AD index Local applicability domain index is relative to the similarity of the query chemical to its five nearest neighbors from the training set
= 0.383 ≤ 0.4)
Model Performance
Bioconcentration Factor Model Results Histogram of Bioconcentration Factor Data
Weighted kNN model statistics
Training (75%) 5-fold CV (75%) Test (25%)
R2 RMSE Q2 RMSE R2 RMSE
0.85 0.53 0.84 0.55 0.83 0.64

Model summary in QSAR Model Reporting Format (QMRF)
Nearest Neighbors from Model Knowledge Base
Neighbor: 1
Measured:  166 L/kg
Predicted: Five fold cross validation prediction for the neighbor
 41.7  L/kg

Structural image of Dibutyl 1,2-benzenedicarboxylate
Dibutyl 1,2-benzenedicarboxylate

 Neighbor: 2
Measured:  20.0 L/kg
Predicted: Five fold cross validation prediction for the neighbor
 44.7  L/kg

Structural image of 1,3-Diphenylguanidine
1,3-Diphenylguanidine

 Neighbor: 3
Measured:  813 L/kg
Predicted: Five fold cross validation prediction for the neighbor
 64.6  L/kg

Structural image of Phoxim
Phoxim

 Neighbor: 4
Measured:  14.1 L/kg
Predicted: Five fold cross validation prediction for the neighbor
 35.5  L/kg

Structural image of Methyl o-benzoylbenzoate
Methyl o-benzoylbenzoate

 Neighbor: 5
Measured:  16.2 L/kg
Predicted: Five fold cross validation prediction for the neighbor
 95.5  L/kg

Structural image of Benzyl butyl phthalate
Benzyl butyl phthalate