An orally available pan-histone deacetylase (HDAC) inhibitor binding all HDAC isozymes with similar affinity (Kis = 16-28 nM) with the exception of HDAC6 and 7 (Kis = 247 and 104 nM, respectively). SB 939 demonstrates good bioavailability in vivo and significantly inhibits tumor growth in various xenograft mouse models at doses ranging from 25-100 mg/kg.
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