Forma cristalina a y racemato cristalino de 1-(5'-(5-(3,5-dicloro-4-fluorofenil)-5-(trifluorometil)-4,5-dihidroisoxazol-3-il)-3'h-espiro[azetidin-3,1'-isobenzofuran]-1-il)-2-(metilsulfonil)etanona; procedimiento de preparacion de la forma cristalina a; composicion que la comprende; y su uso para el tratamiento de una infeccion o infestacion parasitaria.

摘要

The present invention relates to novel crystalline modifications of 1-(5′-(5-(3,5-dichloro-4-fluorophenyl)-5-(trifluoro-methyl)-4,5-dihydroisoxazol-3-yl)-3′H-spiro[azetidine-3,1′-isobenzofuran]-1-yl)-2-(methylsulfonyl)ethanone. The present invention also describes compositions and methods of treating a parasitic infection or infestation in an animal in need thereof. The present invention also relates to processes for making the crystalline forms.