LTB4 antagonist 2, a carboxamide-acid compound, serves as an antagonist to leukotriene B4 (LTB4), possessing potential anti-inflammatory properties. It exhibits high affinity for the LTB4 receptor, with an inhibitory concentration (IC50) of 439 nM [1].

BLT2 antagonist-1 (compound 15b) is a selective inhibitor of the BLT2 receptor, impeding the chemotaxis of CHO-BLT2 cells at an IC50 of 224 nM, while not affecting CHO-BLT1 cell chemotaxis. It blocks the interaction between LTB4 and the BLT2 receptor with a K_i of 132 nM and may serve as a research tool for inflammatory airway diseases, including asthma and chronic obstructive pulmonary disease [1].

RG-12525（NID 525） is an orally available, selective and competitive leukotriene D (LTD) antagonist that inhibits LTC4, LTD4 and LTE4-induced contraction of guinea pig thin-walled bands, with IC50 values of 2.6 nM, 2.5 nM, and 7 nM, respectively.RG-12525 inhibits CYP3A4, with a Ki value of 0.5 µM. RG-12525 is a novel and potent PPAR-γ agonist (IC50 value of about 60 nM) with species specificity for the study of asthma.

REV 5901A (REV 5901 HCl) is an orally active leukotriene receptor antagonist and 5-lipoxygenase inhibitor with antimicrobial activity that attenuates colon cancer growth in mice.REV 5901A has been used in studies of asthma and myocardial infarction. REV 5901A is used to study asthma and myocardial infarction.

Ablukast (Ro 23-3544) is a leuktriene receptor antagonist. Ablukast acts as an anti-asthmatic.