Patent ID: 7129260

Claim:
A compound of formula (I) or a therapeutically acceptable salt thereof, wherein R 1 is selected from the group consisting of hydrogen and alkyl; R 2 is selected from the group consisting of hydrogen, alkoxy, alkoxyalkoxy, alkyl, carboxyalkoxy, carboxyalkyl, halo, haloalkyl, heterocyclylalkoxy, hydroxy, nitro, and —NR c R d ; and one of R 3 and R 4 A-X-R 5 and the other is hydrogen; wherein A-X-R 5 is drawn with its left end attached to the parent molecular moiety; R 5 is phenyl; A is phenyl which is optionally substituted with one or two substituents independently selected from the group consisting of alkyl, halo, haloalkoxy, and haloalkyl; and X is (CH 2 ) m N(R a )C(O)N(R b )(CH 2 ) n , wherein R a and R b are hydrogen, m and n are and wherein each group is drawn with its left end attached to A and its right end attached to R 5 .