Patent ID: 7745422

Claim:
A compound of formula CA1: or a pharmaceutically acceptable salt thereof; wherein: X is H n is 1,2, or 3; R 1 and R 5 are both hydrogens and R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, halogen, an optionally substituted alkyl group having 4-20 carbon atoms, an optionally substituted alkenyl group having 2-20 carbon atoms, an —OR group, an optionally substituted aryl group and an optionally substituted arylalkyl group, where R is selected from an optionally substituted alkyl group having 1-20 carbon atoms; and R 6 and R 7 , independently, are selected from the group consisting of a hydrogen, a halogen, a —N(R′) 2 , or —SR′ group, an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkoxy group, and an optionally substituted aryl group, where each R′, independently, is selected from H, an optionally substituted alkyl group and an optionally substituted aryl group, wherein at least one of R 2 , R 3 or R 4 is selected from the group consisting of a halogen, an optionally substituted alkyl group having 4-20 carbon atoms, an optionally substituted alkenyl group having 2-20 carbon atoms, an —OR group; and wherein R is selected from an optionally substituted alkyl group having 1-20 carbon atoms, an optionally substituted aryl group and an optionally substituted aryl alkyl group.