Fluticasone propionate. Molecular model of the drug fluticasone propionate (C25.H31.F3.O5.S). This glucocorticoid is used to treat asthma, allergic rhinitis, nasal polyps, various skin disorders and Crohn's disease and ulcerative colitis. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (dark blue), oxygen (red), sulfur (yellow) and fluorine (light blue).