... Mometasone furoate monohydrate, the active component of
NASONEX Nasal Spray, 50 mcg, is an anti-inflammatory corticosteroid having the chemical name, 9,21-Dichloro-11ß, 17-dihydroxy-16 -methylpregna-1,4-diene-3,20-dione...
http://www.drkoop.com/druglibrary/93/nasonex.html