Patent ID: 7528167

Claim:
A compound of formula (I) or an enantiomer or diastereoisomer thereof: wherein: A is a 5- or 6-membered carbocyclic ring; X and W together form a carbonyl group; R 1 is H; or one or two substituents independently selected from the group consisting of: hydroxy; halo; lower alkyl; lower alkoxy; lower thioalkyl; haloalkyl; or —C(O)R 2 wherein R 2 is lower alkyl, aryloxy or benzyloxy; Y is phenyl optionally mono- or di-substituted with R 5 or C(O)R 6 , wherein R 5 is lower alkyl, lower cycloalkyl, lower alkoxy, halo, hydroxy, nitrile or trifluoromethyl, and R 6 is lower alkyl, lower cycloalkyl, lower alkoxy, hydroxy or trifluoromethyl; said phenyl ring being optionally fused with a saturated or unsaturated 4 to 6-membered carbocyclic ring; R 3 is selected from the group consisting of: phenyl or lower phenylalkyl, which are mono- or di-substituted with: NHC(O)-lower alkyl, NHC(O)-aryl, NHC(O)—O-lower alkyl or, NHC(O)O-aryl; and R 4 is a carboxylic acid, a salt or an ester thereof.