Triamcinolone acetonide, the active ingredient of AllerNaze (triamcinolone acetonide nasal spray) , is a corticosteroid with the chemical name, 9?-Fluoro-11?,16?, 17, 21?­tetrahydroxypregna-1,4-diene-3, 20-dione cyclic 16, 17-acetal with acetone (C24 H31 FO6 ). Its structural formula is: