Patent 8236985 was granted and assigned to Imperial Innovations on August, 2012 by the United States Patent and Trademark Office.
There is provided a compound of formula (I) wherein R1a, R2a, R3, X1 to X6, a, b and c have meanings given in the description, which compounds are useful as, or are useful as prodrugs of, inhibitors of HDAC enzyme activity, and thus, in particular, in the treatment of conditions where inhibition of HDAC enzyme activity is required.