The preparation and topical antiinflammatory potencies of a series of'in-halogeno-16- substituted-prednisolone derivatives are described. The 7a-Chl0rO, 7aLu-bromo, and 7a- iodo corticosteroids were obtained by addition of hydrogen halide to the 6, 7-dehydro compounds. The extent of addition of HCl varied with substitution at C-11, while no addition of HF was observed at all. The 7n-flUOro corticosteroids were prepared by reaction of the ...