ChEMBL is a large-scale database that contains information on bioactive compounds and their biological activities. It is primarily used by researchers in the fields of drug discovery and medicinal chemistry. The database includes data on various chemical entities, their interactions with biological targets, and their effects on different diseases. Developed and maintained by the European Molecular Biology Laboratory, ChEMBL provides valuable resources for scientists looking to understand the relationships between chemical structures and their pharmacological properties. It supports the development of new drugs by offering insights into compound efficacy, safety, and potential side effects.