Patent ID: 7348322

Claim:
A compound of formula I wherein: A is CH 2 or C═O R 1 is H or C 1 -C 6 alkyl; R 2 and R 3 are each independently H, CF 3 , NO 2 or an optionally substituted five-membered heteroaryl ring; or R 2 and R 3 together form an oxazolinyl ring substituted with 0-2 substituents selected from the group consisting of C 1 -C 6 alkyl and oxo, with the proviso that when R 2 and R 3 together form said oxazolinyl or oxazinyl ring, A is CH 2 ; X is O or N—OR 4 , wherein R 4 is H or C 1 -C 6 alkyl; and pharmaceutically acceptable salts thereof.