Fosdenopterin Hydrobromide and its Impurities

Fosdenopterin Hydrobromide, sold under the brand name Nulibry, is a medication used to reduce the risk of death due to a rare genetic disease known as molybdenum cofactor deficiency type A. Reference standards of Fosdenopterin Hydrobromide API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.