Patent ID: 8163795

Claim:
A method of treating cancer, the method comprising administering to a subject in need thereof, one or more compounds of the formula (I): wherein R 1 is hydrogen; alkyl, cycloalkyl or C(O)R 7 , R 2 and R 3 are independently hydrogen, hydroxy, alkoxy, alkyl, cycloalkyl, halo or OC(O)R 7 , with the exception that R 2 and R 3 are not both hydrogen; R 4 , R 5 and R 6 are independently hydrogen, hydroxy, alkoxy, alkyl, cycloalkyl, acyl, amino, C 1-4 -alkylamino or di(C 1-4 -alkyl)amino, OC(O)R 7 or OR 8 ; R 7 is hydrogen, alkyl, cycloalkyl, aryl, arylalkyl or amino; and R 9 is hydrogen, hydroxy, alkyl, alkoxy, cycloalkyl or halo; or a pharmaceutically acceptable salt thereof, optionally in association with a carrier and/or excipient.