Dexamethasone. Molecular model of the corticosteroid drug Dexamethasone (C22.H29.F.O5). It is used in a wide range of conditions for its inflammatory and immunosuppressant effect. It was found to reduce mortality in critically ill patients with Covid-19. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), fluorine (cyan) and oxygen (red).