SPL Set ID: b7f675e2-159c-490c-b6f4-3f16d9492b7d

Niraparib is an orally available poly (ADP-ribose) polymerase (PARP) inhibitor. The chemical name for niraparib tosylate monohydrate is 2-{4-[(3S)-piperidin-3-yl]phenyl}- 2H -indazole 7-carboxamide 4-methylbenzenesulfonate hydrate (1:1:1). The molecular formula is C 26 H 30 N 4 O 5 S and it has a molecular weight of 510.61 amu. The molecular structure is shown below: Niraparib tosylate monohydrate is a white to off-white, non-hygroscopic crystalline solid. Niraparib solubility is pH independent below the pKa of 9.95, with an aqueous free base solubility of 0.7 mg/mL to 1.1 mg/mL across the physiological pH range. Each ZEJULA tablet contains 159.3 mg, 318.7 mg, or 478.0 mg of niraparib tosylate monohydrate equivalent to 100 mg, 200 mg, or 300 mg, respectively, of niraparib free base as the active ingredient. The inactive ingredients in the core tablet are crospovidone, lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone, and silicon dioxide. The film-coating consists of Opadry II Gray (100 mg), Opadry II Blue (200 mg), or Opadry II Green (300 mg). Molecular Structure