22 R OR 22 S EPIMER OF PREGN-4-ENE-3,20-DIONE DERIVATIVE, PROCESS OF ITS PREPARATION AND PHARMACEUTICAL PREPARATION CONTAINING THEREOF

摘要

Described are compounds of formula I in the form of the 22R and 22S epimers, wherein X 1 and X 2 are the same or different and each represents a hydrogen or fluorine atom with the proviso that X.sub.1. X is not a hydrogen atom, processes for their preparation, and pharmaceutical compositions containing them. These compounds can be used to treat inflammatory and allergic conditions