Vilanterol Trifenatate and its Impurities

Vilanterol Trifenatate is used in adults with asthma or COPD, to improve symptoms and prevent bronchospasm or asthma attacks. It is an ultra-long-acting β2 adrenoreceptor agonist.Reference standards of Vilanterol Trifenatate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.