| abstract |
The present invention relates to uses of the compounds of Formula I as well as pharmaceutically acceptable salts and stereoisomers thereof in methods to treat a variety of tumors in mammals involving abnormal tyrosine kinase signaling, the compounds represented as: wherein R1 and R2 are independently selected from the group consisting of H; alkyl; alkenyl; alkynyl; halogen; aryl; heteroaryl containing N, O, or S; the aryl and heteroaryl may be further substituted with halogen, an alkyl, alkenyl, and alkynyl; NZ1Z2, wherein Z1 and Z2 are independently selected from the group consisting of H and alkyl; and (CO)Y wherein Y is selected from the group consisting of H, alkyl, alkenyl, alkynyl, aryl, heteroaryl containing N, O, or S, and the aryl and heteroaryl may be further substituted with halogen, alkyl, alkenyl, and alkynyl; with the proviso that when R1 is hydrogen, R2 is a group other than hydrogen. |