Patent ID: 7112610

Claim:
A method of treating a disorder or condition in a mamma including a human, the disorder or condition selected from restless leg syndrome and periodic limb movement disorder, the method comprising administering to the mamma in need of such treatment a therapeutically effective amount of a compound represented by formula IA or a pharmaceutically acceptable salt thereof, wherein R 1 is hydrogen or (C 1 –C 3 )alkyl optionally substituted with from one to five fluorine atoms; R 2 is hydrogen or (C 1 –C 3 )alkyl optionally substituted with from one to five fluorine atoms; and R 3 is (C 1 –C 6 )alkyl, (C 3 –C 6 )cycloalkyl, or (C 3 –C 6 ) cycloalkyl-(C 1 –C 3 )alkyl, wherein each of the foregoing alkyl moieties can be optionally substituted with from or to five fluorine atoms; with the proviso that when R 1 is hydrogen, R 2 is not hydrogen.