Patent ID: 7247648

Claim:
A compound of formula (I): wherein: a) each R 1 is independently chosen from hydrogen, halo, cyano, hydroxy, carboxy, keto, thioketo, amino, acylamino, acyl, amido, phenyl, aryloxy, alkyl, alkenyl, alkynyl, heteroalkyl, haloalkyl, alkoxy, aryl, and cycloalkyl; b) each R 2 is independently chosen from hydrogen, halo, cyano, hydroxy, carboxy, keto, thioketo, amino, acylamino, acyl, amido, phenyl, aryloxy, alkyl, alkenyl, alkynyl, heteroalkyl, haloalkyl, alkoxy, aryl, and cycloalkyl; c) R 3 and R 4 , together with the nitrogen atom to which they are bonded, join to form a pyrrolidine ring, optionally substituted with one or more hydrogen, halo, cyano, hydroxy, carboxy, keto, thioketo, amino, acylamino, acyl, amido, alkyl, alkenyl, alkynyl, heteroalkyl, haloalkyl, alkoxy, and combinations thereof; and d) R 5 and R 6 are each independently chosen from hydrogen, halo, cyano, hydroxy, carboxy, keto, thioketo, amino, acylamino, acyl, amido, phenyl, aryloxy, alkyl, alkenyl, alkynyl, heteroalkyl, haloalkyl, alkoxy, aryl, and cycloalkyl; or optical isomers, diastereomers and enantiomers of the formula above, or a pharmaceutically-acceptable salt thereof.