Figure 1

Distribution maps of nine calculated physicochemical descriptors for five databases: WDI (grey), NPD (orange), NCI (teal), MLSMR (green), and KBD (blue). Each box plot shows a wide rectangular block of interquartile range (IQR) between the 1^st quartile and 3^rd quartile (covering 50% of the total range). A long, narrow, solid rectangle is also shown within the IQR, indicating upper and lower adjacent values (UAV and LAV). The dots beyond UAV and LAV are outliers.