3-(3,4-Dichlorophenyl)-3-hydroxy-phthalimidin;Chlorthalidone Impurity G;(3-(3,4-Dichlorophenyl)-3-hydroxy-phthalimidine);3-(3,4-dichlorophenyl)-3-hydroxy-2H-isoindol-1-one;Chlortalidone EP Impurity G;Chlortalidone Impurity 7(Chlortalidone EP Impurity G);Chlorthalidone EP Impurity G;Chloro Chlorthalidone