CP-96021 is a potent and orally available leukotriene D 4 ( LTD 4 K i =34 μM) / platelet activating factor ( PAF K i =37 μM) receptor antagonist. CP-96021 has antagonist capable of simultaneously targeting two different inflammatory mediators, LTD 4 and PAF. CP-96021 shows high specificity for α1, α2, β, dopamine-2, adenosine 1, 5-HT1, H1, muscarine, μ opioid , and GABA receptors, all expressing IC 50 values greater than 10 μM. CP-96021 can be used to study the pathogenesis of many inflammatory diseases such as asthma.