To aid the selection of the best chemical probes for experiments, we link extensively with the Chemical Probes Portal (30) (chemicalprobes.org) for expert-evaluated chemical probes; and also to Probe Miner (31) (probeminer.icr.ac.uk) which provides systematic, data-driven large-scale assessment of chemical probes. Collectively, these data enhance the information available to translational researchers in canSAR. With the additional compounds generated through our curation pipelines, canSAR now contains data for >3 million bioactive small molecules.