Patent ID: 7767680

Claim:
A compound of formula Ia: or a pharmaceutically acceptable salt thereof, wherein: Each X is defined by -Z A R 6 , wherein each Z A is independently a bond; Each R 6 is independently R A , halo, —OH, —NH 2 , —NO 2 , —CN, —CF 3 , or —OCF 3 , —CH 3 , —O-Phenyl, —OCH 3 , —O-isopropyl, —N(H)C(O)—CH 3 , —CH 2 ═CH 2 —COOH, and phenyl; Each R A is independently hydrogen; Each n is 1-4; Each R 1 is an alkyl or cycloalkyl; and R 2 is defined by -Z B R 7 , wherein Z B is a bond; Each R 7 is R B ; Each R B is an optionally substituted phenyl; R 3 and R 4 form an optionally substituted six-membered monocyclic heterocycloalkyl ring with at least two heteroatoms, at least one being nitrogen.