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Table S1. Selected compounds for this study, their names, SMILES strings, CAS numbers, observed log P_e values and predicted values by SVR A, SVR B, HSVR, and PLS, data partitions, and references; Table S2. Optimal runtime parameters for the SVR models; Figure S1. Histograms of: (A) observed log P_e; (B) molecular weight (MW); (C) log P; (D) log D; (E) polar surface area (PSA); (F) fractional polar surface area (FPSA); and (G) dipole moment (μ) in density form for all molecules in the training set, test set, and outlier set.