These data were compiled and described by He and Jurs (2005). The data set consists of 322 compounds that were experimentally assessed for toxicity. The outcome is the negative log of activity (but is labled as "activity"). The structures and outcomes were obtained from http://www.qsarworld.com/index.php.The package contains none sets of molecular descriptors: atom pair distances, Daylight fingerprints (http://www.daylight.com/dayhtml/doc/theory/theory.finger.html), Dragon descriptors (http://www.talete.mi.it/products/dragon_plus.htm), MOE2D, MOE2D fingerprints, MOE3D, PipelinePilot fingerprints (http://accelrys.com/products/pipeline-pilot/) and QuickProp descriptors (http://www.schrodinger.com/products/14/17/).
For fingerprints, the 500 most variable bits were selected whenever possible.