ERK1/2 inhibitor 3 is a potent inhibitor of ERK1/2. Mitogen-activated protein kinase (MAPK) plays an extremely important role in the signal transduction pathway, and extracellular signal regulated kinase ( ERK ) is a member of the MAPK family. ERK1/2 inhibitor 3 has the potential for the research or prevention of cancer , inflammation or other proliferative diseases (extracted from patent WO2021218912A1, compound 1).