Patent ID: 7119114

Claim:
A compound having the structure: or a pharmaceutically acceptable salt thereof, wherein R 1 and R 2 are optional substituents that are the same or different and independently represent trifluoromethyl, sulfonyl, aryl, arylalkyloxy, arylalkyl, cycloalkylalkyloxy, cycloalkyloxy, alkoxyalkoxy, aminoalkoxy, mono- or di-alkylaminoalkoxy, or a group represented by formula (a), (b), (c) or (d): R 3 and R 4 are the same or different and independently represent cycloalkyl, aryl, arylalkyl, cycloalkylalkyl, aryloxyalkyl, alkoxyalkyl, alkoxyamino, or alkoxy(mono- or di-alkylamino); and R 5 represents hydrogen, alkyl, cycloalkyl, carbocyclic aromatic, heterocyclic aromatic, arylalkyl, cycloalkylalkyl, alkoxy, amino, mono- or di-alkylamino, arylamino, arylalkylamino, cycloalkylamino or cycloalkylalkylamino, with the proviso that carbocyclic aromatic is not phenyl; and with the proviso that at least R 1 or R 2 is present.