Flow diagram to explore data on hERGCentral using external public database IDs. Here, the widely used PubChem CIDs (A) and SIDs (B) are accepted by hERGCentral Web interfaces, which allow multiple ID submission for a given query. For those IDs with matched results found on hERGCentral, results will be returned directly; for those with no matched results found, hERGCentral still retrieves compound profile, including molecular formula, etc., from PubChem. If users click the “” button next to the formula, hERGCentral will fetch the structure information from PubChem database. With the fetched structure information, the structure search will run on hERGCentral; thus, results of similar chemical structures can still be returned to users.