Patent ID: 7795313

Claim:
A method of treating a subject with sarcoma, leukemia or lymphoma comprising administering to the subject an effective amount of a compound represented by the following structural formula: wherein: Y is a covalent bond or a substituted or unsubstituted straight chained hydrocarbyl group; R 1 -R 4 are independently —H, an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group, or R 1 and R 3 , taken together with the carbon and nitrogen atoms to which they are bonded, and/or R 2 and R 4 taken together with the carbon and nitrogen atoms to which they are bonded, form a non-aromatic heterocyclic ring optionally fused to an aromatic ring; Z is —O or —S; and M + is a pharmaceutically acceptable monovalent cation and M 2+ is a pharmaceutically acceptable divalent cation.