Discovery of 4-{1-[({1-[4-(trifluoromethyl)benzyl]-1H-indol-7-yl}carbonyl)amino]cyclopropyl}benzoic acid (MF-766), a highly potent and selective EP4 antagonist for treating inflammatory pain

The discovery of a highly potent and selective EP4 antagonist MF-766 is discussed. This N-benzyl indole derivative exhibits good pharmacokinetic profile and unprecedented in vivo potency in the rat AIA model.