The chemical Zafirlukast has a designated molecular formula of C31H33N3O6S and a molecular weight of 575.680 g/mol. Synonyms may include: Accolate, UNII-XZ629S5L50, ICI-204219, ICI 204219, Aeronix, Olmoran (ChemID). Zafirlukast has been assigned a MeSH pharmacological action of: Leukotriene Antagonist.