Patent ID: 7402604

Claim:
A compound of Formula I: wherein: R 1 represents hydrogen or C 1 -C 4 alkyl; W represents C(O)NR 6 ; R 2 represents (CH 2 ) p CH[(CH 2 ) q R 7 ](CH 2 ) t R 8 ; R 3 and R 5 independently represent hydrogen or C 1 -C 4 alkyl; R 4 represents hydrogen or C 1 -C 4 alkyl; R 6 represents hydrogen or C 1 -C 4 alkyl; R 7 is Ar; R 8 is selected from CN, N 3 , or OR 10 , where R 10 is H; Ar represents phenyl or naphthyl; Ar is optionally substituted with one or more substituents independently selected from: hydrogen, halogen, C 1 -C 4 alkyl, CN, NO 2 , CF 3 , OR 12 , NR 12 R 13 and COOR 12 ; R 12 and R 13 independently represent hydrogen, C 1 -C 4 alkyl, aryl, or heteroaryl, and p, q, and t are independently 0, 1 or 2; or an enantiomer thereof, or a pharmaceutically-acceptable salt thereof.