zafirlukast [ 4-(5-cyclopentyloxycarbonylamino-2-methylindol-3-yl-methyl)-3-methoxy-N-O-tolylsulfonylbenzamide,Accolate,Aeronix,AstraZeneca brand of zafirlukast,ICI 204,219,ICI 204219,ICI-204219,Menarini brand of zafirlukast,Novartis brand of zafirlukast,Olmoran,Zeneca brand of zafirkulast ] a leukotriene D4 receptor antagonist