1246213-24-0

Ivacaftor Impurity 1 Ivacaftor carboxylate Ivacaftor Carboxylic Acid Ivacaftor Carboxylic Acid Impurity 2-[5-tert-butyl-2-hydroxy-4-[(4-oxo-1H-quinoline-3-carbonyl)amino]phenyl]-2-methylpropanoic acid 2-(5-tert-butyl-2-hydroxy-4-(4-oxo-1,4-dihydroquinoline-3-carboxamido)phenyl)-2-methylpropanoic acid Benzeneacetic acid, 4-[[(1,4-dihydro-4-oxo-3-quinolinyl)carbonyl]aMino]-5-(1,1-diMethylethyl)-2-hydroxy-α,α-diMethyl- Benzeneacetic acid, 4-[[(1,4-dihydro-4-oxo-3-quinolinyl)carbonyl]aMino]-5-(1,1-diMethylethyl)-2-hydroxy-α,α-diMethyl- Benzeneacetic acid, 4-[[(1,4-dihydro-4-oxo-3-quinolinyl)carbonyl]aMino]-5-(1,1-diMethylethyl)-2-hydroxy-alpha,alpha-diMethyl-