Compounds of formula (I), and salts, N-oxides, hydrates and solvates thereof are
histone deacetylase inhibitors and are useful in the treatment of
cell proliferative diseases, including cancers:wherein Q, V and W independently represent —N═ or —C═; B is a
divalent radical selected from (B1), (B2), (B3), (B4), (B5) and (B6).wherein the bond marked * is linked to the ring containing Q, V and W through -[
Linker1]- and the bond marked ** is linked to A through -[
Linker2]-; A is an optionally substituted mono-, bi- or tri-cyclic carbocyclic or heterocyclic ring
system; -[
Linker1]- and -[Linker2]- independently represent a bond, or a
divalent linker radical; and R is (a) a radical of formula R1R2CHNH—Y-L1-X1—(CH2)z— or (b) a radical of formula R-L1-Y1—(CH2)z—,