3-Quinolinecarbonyl chloride, 1,4-dihydro-4-oxo- (9CI)

1,4-Dihydro-4-oxo-3-quinolinecarbonyl Chloride is an intermediate in synthesizing Ivacaftor Carboxylic Acid (I940605). It is an impurity of Ivacaftor (I940600); a drug used in the treatment of cystic fibrosis.