Described are compounds of Formula I or Formula II: wherein: ring A is a 5- or 6-membered heteroaryl group dashed lines are optional double bonds X is N or O Y is a carbon atom or an S or N heteroatom in ring A in any suitable location and substituents are as given herein. Compositions containing the same and methods of using the same in treating cancers such as acute lymphoblastic leukemia are also described.
