GSK 256066 Trifluoroacetate is primarily utilized in research settings as a potent and selective inhibitor of phosphodiesterase 4 (PDE4). Its application is significant in studying inflammatory diseases, as PDE4 plays a crucial role in regulating inflammatory responses. Researchers use it to explore potential therapeutic effects in conditions like chronic obstructive pulmonary disease (COPD), asthma, and other inflammatory disorders. Additionally, it serves as a valuable tool in understanding the biochemical pathways and mechanisms involving PDE4, aiding in the development of targeted treatments for various diseases.