Synonyms: Acetazolamide Related Compound D, Acetazolamide Imp. D (EP), Acetazolamide USP Related Compound D, Acetazolamide USP RC D, 1,3,4-Thiadiazole-2-sulfonamide, 5-amino-, 2-Amino-1,3,4-thiadiazole-5-sulfonamide, 5-Amino-1,3,4-thiadiazol-2-sulfonamide, 5-Amino-1,3,4-thiadiazole-2-sulfonamide, CL 5343, NSC 22979, Tio-urasin, Acetazolamide Related Compound D, Acetazolamide Impurity D.