Patent ID: 8809337

Claim:
A method for treating cell proliferative disorders, the cell proliferative disorders selected from the group consisting of breast cancer, colon cancer, lung cancer, blood cancer, pancreatic cancer, skin cancer, brain cancer and bone cancer and combinations thereof, which comprises administering to a mammal in need thereof, as a prodrug, an effective amount of a compound of the formula (I): wherein R represents a straight or branched C 1 -C 12 alkyl, an aryl or heteroaryl group, R 1 represents a hydrogen atom or a substituent attached to any available atom of the A ring, R 2 represents an optionally substituted group selected from straight or branched C 1 -C 6 alkyl, aryl, heteroaryl, C 3 -C 6 cycloalkyl, C 2 -C 6 alkenyl or alkynyl, C 3 -C 6 cycloalkyl C 1 -C 6 alkyl, aryl C 1 -C 6 alkyl, heteroaryl C 1 -C 6 alkyl, a 5 or 6 membered heterocyclyl and heterocyclyl C 1 -C 6 alkyl with from 1 to 3 heteroatoms selected from nitrogen, oxygen and sulphur, A ring represents a phenyl or a heterocycle and m is a value from 1 to 6, or a pharmaceutically acceptable salt thereof.