Patent ID: 7893064

Claim:
A compound of Formula (I): or a pharmaceutically acceptable salt thereof, wherein substituents on each side of the iminomethyl double bond in Formula (I) may be in the E or Z configuration; and wherein R 1 is hydrogen, C 1-6 alkyl, trihalo C 1-6 alkyl, C 3-6 cycloalkyl, optionally substituted phenyl, or optionally substituted benzyl, wherein phenyl and the phenyl portion of benzyl is optionally substituted with one, two or three substituents selected from C 1-6 alkyl, C 1-6 alkoxy, hydroxy, amino, halogen, or trihalo C 1-6 alkyl; R 2 is hydrogen, or C 1-6 alkyl; or R 1 and R 2 taken together form an optionally substituted heterocyclic ring, wherein the heterocyclic ring is optionally substituted with one, two or three substituents selected from C 1-6 alkyl, C 1-6 alkoxy, C 1-6 alkoxy-C 1-6 alkyl, hydroxy-C 1-6 alkyl, or trihalo C 1-6 alkyl; R 3 is benzyl optionally substituted with halo; and R 4 is hydrogen or halo.