[Dictionary] ChEMBL

A manually curated database, maintained by EMBL-EBI, of bioactive small molecules with drug-like properties -- recording measured bioactivity values (Ki, Kd, IC50, EC50) against specific molecular targets, extracted from medicinal-chemistry literature and deposited screening data, not merely a registered chemical structure. Released under a Creative Commons Attribution-ShareAlike license and accessible via web interface, bulk FTP/SQLite download, REST web services, and a SPARQL endpoint. Originated as StARlite (Inpharmatica Ltd.), acquired and reorganized by EMBL-EBI with Wellcome Trust funding in 2008, first released as ChEMBL in 2009.