The invention provides a metalloproteinsae inhibitor compound comprising a metal binding group having formula (I), for use in the treatment of a disease or condition mediated by one or more metalloproteinase enzymes wherein X is selected from NR1, O, S; B is C or CH, Y1 and Y2 are idenpendently selected from O, S; R1 is selected from H, alkyl, haloalkyl.
Novel crystal modifications of (5S)-5-[4-(5-chloro-pyridin-2-yloxy)-piperidine-1-sulfonylmethyl]-5-methyl-imidazolidine-2,4-dione are disclosed together with processes for preparing such modifications, pharmaceutical compositions comprising such a modification, and the use of such a modification in therapy.