Patent ID: 7803790

Claim:
A method for treating, reducing the frequency of, or delaying the onset of pain, comprising administering to a patient in need thereof an effective amount of a compound of formula Va or a salt thereof: wherein R 1 is absent or represents one or more substituents on the ring to which they are attached wherein each of said one or more substituents are, independently for each occurrence, selected from among lower alkyl, alkoxy, carboxyl, amido, sulfonamido, heterocyclyl, cycloalkyl, hydroxyl, amino, acylamino, sulfonylamino, or R 1 taken together with the carbon to which it is attached forms a carbonyl or thiocarbonyl, and R 2 and R 3 are absent or represent one or more substituents on the ring to which they are attached, wherein each of said one or more substituents are, independently for each occurrence, selected from among lower alkyl, alkoxy, carboxyl, amido, sulfonamido, heterocyclyl, cycloalkyl, hydroxyl, amino, acylamino, sulfonylamino, nitro, halogen, CF 3 , or cyano.