Hydrochlorothiazide Impurity 4 5-Chloroorthanilic acid Salicylamide 5-Chloro Hydrochlorothiazide Hydrochlorothiazide Chlorothiazide NSC525339 3-Methyl-4H-1,2,4-benzothiadiazine 1,1-dioxide Hydrochlorothiazide Related Compound (N-[(2-Aminophenyl)sulfonyl] Acetamide) 4-Amino-6-chlorobenzene-1,3-disulfonamide