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Sulfamerazine-13c6

Sulfadimidine-13c6

Sulfapyridine-13c6

Sulfaquinoxaline-13c6

Sulfisoxazole-13c6 (sulfafurazole-13c6)

Sulfanitran-13c6

Sulfachloropyrazine-13c6

Sulfaphenazole-13c6

Sulfapyrazole-13c6

Nalidixic acid-d5

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