Patent ID: 8097612

Claim:
A compound represented by the following formula: or an R-enantiomeric form, S-enantiomeric form, or racemic mixture thereof, or a pharmaceutically acceptable salt thereof; wherein A 1 is H, Br, Cl, NO 2 , or CF 3 ; R 1 is CH 3 or H; R 3 is H, Br, Cl, NO 2 , or CF 3 , R 4 is phenyl, R 5 is CH 3 , —CH 2 CH 3 , —(CH 2 ) 2 CH 3 , —CH(CH 3 ) 2 , —(CH 2 ) 3 CH 3 , —C(CH 3 ) 3 , phenyl, phenoxy, hydroxyphenyl, Br, F or Cl; R 6 is H, Br, Cl, F, —OCH 3 , or —OCH(CH 3 ) 2 ; X is CH 2 , or NH; and provided that at least one of A 1 and R 3 is not H.