Patent ID: 7498441

Claim:
A compound represented by the structural formula: or a pharmaceutically acceptable salt of said compound, stereoisomer or racemate wherein X is —CH 2 —, carbonyl, —CHCH 3 or —C(CH 3 ) 2 —; Y is —(CR 2 R 3 ) p —, —(CR 2 R 3 ) p C(O)NH—, —(CR 2 R 3 ) p NH—, —C(O)NH—, —C(O)(CR 2 R 3 ) p NH—, —C(O)C(O)NH— or —C(O)(CR 2 R 3 ) p —; wherein any of the foregoing radicals for Z may be unsubstituted or optionally independently substituted with a cyano, fluoro, chloro, methoxy, trifluoromethyl, trifluoromethoxy, formyl or a carboxyl group, or alternatively Z is a 2,5-dichlorophenyl; n is 0, and when n is 0, no connecting bond exists between the two carbons adjacent to the nitrogen; p is 1, 2 or 3; r is 1; R 1 is hydrogen, cyclopentyl, methyl, benzyl, 5-hydroxy-n-pentyl, cycloheptyl, N-methylpiperidine-4-yl, 4-oxacyclohexyl, 3-thiacyclopentyl, furane-3-ylmethyl, 2-methoxybenzyl, cyclopropylmethyl, cyclobutyl, 3-phenylpropyl, isopropyl, cyclohexyl, cyclopentylcarbonyl, diethylaminocarbonyl, acetyl, methylsulfonyl, dimethylaminosulfonyl, thiazole-2-ylmethyl, or ethylsulfonyl; R 2 and R 3 can be the same or different, each being independently hydrogen, or alkyl; and R 4 is phenyl substituted with halogen or