CE 3F4 (cas# 143703-25-7) is a useful research chemical.CE 3F4 is an Epac1 inhibitor compound. It blocked Epac1 guanine nucleotide exchange activity toward its effector Rap 1 both in cell-​free systems and in intact cells. CE3F4 is a tetrahydroquinoline analog that fails to influence protein kinase A holoenzyme activity.