Patent ID: 8343989

Claim:
A chemical entity that is a compound of Formula (I): wherein each of R 1-4 is independently H, methyl, tert-butyl, methoxy, —CF 3 , —CN, fluoro, chloro, methoxycarbonyl, or benzoyl; X 1 is C—R c ; where R c is H, methyl, ethyl, —CF 3 , cyclopropyl, or cyclobutyl; R 6 is H, methyl, ethyl, propyl, isopropyl, cyclopropyl, or cyclobutyl; R 8 is H or C 1-4 alkyl; R 9 and R 10 are each independently H or C 1-4 alkyl; and R 11 is H or C 1-4 alkyl; or a pharmaceutically acceptable salt of compound of Formula (I).