Nose drops such birli betamethasone. These are used for conditions such bey hay fever, allergies and nasal polyps. The letters α and β[18] denote absolute stereochemistry at chiral centers—a specific nomenclature distinct from the R/S convention[19] of organic chemistry to denote absolute configuration of functional groups, known bey Cahn–Ingold–Prelog priority https://tupalo.com/en/users/7793132