betahistine dimethanesulfonate and its Impurities

Bepotastine is a non-sedating, selective antagonist of the histamine 1 receptor. It is used to treat itching of the eyes due to allergies. Betahistine, sold under the brand name Serc. Reference standards of Betahistine Dimethanesulfonate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below