Title: Healy MP, et al. Discovery of {4-,9-bis(ethyloxy)-1-oxo-1,3-dihydro-2H-benzo[fisoindol-2-yl-2-fluorophenyl}acetic acid (GSK726701A), a novel EP4 receptor partial agonist for the treatment of pain. Bioorg Med Chem Lett. 2018 Jun 1;28(10):1892-1896.