GR-159897 is a potent and selective NK2 receptor antagonist drug. It has anxiolytic effects in animal models, and also inhibits bronchoconstriction of the airways, which may potentially make it useful in the treatment of asthma. See also Ibodutant Nepadutant Saredutant References Anxiolytics NK2 receptor antagonists Tryptamines Fluoroarenes Piperidines Ethers Sulfoxides