levobunolol hydrochloride and its Impurities

Levobunolol Hydrochloride is used topically in the form of eye drops to manage ocular hypertension and open-angle glaucoma. It is a non-selective beta blocker. Reference standards of Levobunolol Hydrochloride API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.