Patent ID: 7019031

Claim:
A method of inhibiting the growth of a cancer cell, the method comprising contacting the cancer cell with a compound of Formula I: or a pharmaceutically acceptable salt, prodrug, or ester thereof where A 1 , A 2 , and A 3 , are independently selected from the group consisting of hydrogen, alkyl, alkoxy, alkoxyalkyl, aryloxy, cycloalkoxy, alkylthio, alkenyl, alkynyl, cycloalkyl, haloalkyl, alkanoyl, aroyl, aminocarbonyl, aminoalkanoyl or optionally substituted aminoalkanoyl, carbocycloalkyl or optionally substituted carbocycloalkyl, heterocyclo or optionally substituted heterocyclo, heteroaryl or optionally substituted heteroaryl, aryl, alkyl, alkoxycarbonyl, alkylcarbonyloxy, alkoxyalkanoyl, and carboxyalkyl, and A 4 is selected from the group consisting of hydrogen, alkyl, alkoxy, alkoxyalkyl, aryloxy, cycloalkoxy, alkylthio, alkenyl, alkynyl, cycloalkyl, haloalkyl, alkanoyl, aroyl, aminocarbonyl, aminoalkanoyl or optionally substituted aminoalkanoyl, carbocycloalkyl or optionally substituted carbocycloalkyl, heterocyclo or optionally substituted heterocyclo, heteroaryl or optionally substituted heteroarbl, aryl, aralkyl, (heterocyclo)alkyl, (heteroaryl)alkyl, alkoxycarbonyl, alkoxyalkanoyl, carboxyalkyl, amino or substituted amino, and alkanoylamido, with the proviso that A 1 , A 2 , A 3 , and A 4 are not all hydrogen.