Patent ID: 8501995

Claim:
A compound having the formula (I), or a pharmaceutically acceptable salt thereof: wherein R 1 is H, R 2 is CH 2 CCH and R 3 is CH 2 CCH; R 1 is H, R 2 is H and R 3 is CH 2 CCH; R 1 is CH 3 , R 2 is H and R 3 is CH 2 CCH; R 1 is OCH 3 , R 2 is H and R 3 is CH 2 CCH; R 1 is C 1 , R 2 is H and R 3 is CH 2 CCH; R 1 is F, R 2 is H and R 3 is CH 2 CCH; R 1 is CF 3 , R 2 is H and R 3 is CH 2 CCH; R 1 is CH 3 , R 2 is CH 2 CCH and R 3 is CH 2 CCH; R 1 is OCH 3 , R 2 is CH 2 CCH and R 3 is CH 2 CCH; R 1 is C 1 , R 2 is CH 2 CCH and R 3 is CH 2 CCH; R 1 is F, R 2 is CH 2 CCH and R 3 is CH 2 CCH; or R 1 is CF 3 , R 2 is CH 2 CCH and R 3 is CH 2 CCH.