FORM OF FLUNISOLIDE AND THE USE OF FLUNISOLIDE TO TREAT RESPIRATORY DISEASES

摘要

A method of preparing a crystalline compound, 6 α-fluoro-11 β, 21-dihydroxy-16 α, 17 α-isopropylidendioxypregna-1,4-dien-3-20-dione, which has a particle size of less than 100 microns and a predetermined X-ray diffraction pattern, characterized in that it consists in bringing into contact another polymorphic form of said compound with a suitable liquid halogenated lower alkane for an effective time to convert substantially all the polymorphic form to the crystalline form. (Machine-translation by Google Translate, not legally binding)