Chlorthalidone Impurity F Chlortalidone Impurity 6（Chlortalidone EP Impurity F） Chlortalidone EP Impurity F Chlorthalidone EP Impurity F Benzenesulfonamide, 2-chloro-N-[[2-chloro-5-(2,3-dihydro-1-hydroxy-3-oxo-1H-isoindol-1-yl)phenyl]sulfonyl]-5-(2,3-dihydro-1-hydroxy-3-oxo-1H-isoindol-1-yl)- 2-Chloro-N-((2-chloro-5-(1-hydroxy-3-oxoisoindolin-1-yl)phenyl)sulfonyl)-5-(1-hydroxy-3-oxoisoindolin-1-yl)benzenesulfonamide (Chlortalidone Impurity)