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Triamterene Impurities

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PHR1820   2,4-diamino-7-hydroxy-6-phenylpteridine (Triamterene Related Compound C) Pharmaceutical Secondary Standard; Certified Reference Material New 2,4-Diamino-7-hydroxy-6-phenylpteridine NSC 33416
PHR1819   2,7-diamino-4-hydroxy-6-phenylpteridine (Triamterene Related Compound B) Pharmaceutical Secondary Standard; Certified Reference Material New 2,7-Diamino-4-hydroxy-6-phenylpteridine 2,7-Diamino-6-phenylpteridin-4-ol