Patent ID: 7045522

Claim:
A chemical compound having the formula in labelled or unlabelled form, or any of its enantiomers or any mixture thereof, or a pharmaceutically acceptable salt thereof; R represents hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, a mono- or polycyclic aryl group, or aralkyl; and R 1 represents a bi-cyclic heterocyclic group selected from the group consisting of 5- or 6-benzimidazolyl, 5- or 6-benzofuranyl, 5- or 6-benzothiazolyl, 5- or 6-benzothienyl, 5- or 6-Benzotriazolyl, 6- or 7-cinnolinyl, 5- or 6-indazolyl, 5- or 6-indolizinyl, 5- or 6-indolyl, 5- or 6- isoindolyl, 6- or 7-isoquinolinyl, 6-phthalazinyl, 6- or 7-quinolinyl, 6- or 7-quinolizinyl, and 6- or 7-quinoxalinyl; which heterocyclic groups may be substituted one or more times with substituents selected from the group consisting halogen, amino, hydroxy, alkoxy, alkoxy-alkyl, alkoxy-alkoxy, sulfanyl, alkylsulfanyl, alkylsulfanyl-alkoxy, alkoxy-alkylsulfanyl, and alkylsulfanyl-alkylsulfanyl.