Patent ID: 7045539

Claim:
A compound of the formula (I) or a pharmaceutically acceptable salt thereof, wherein: X is O; R 1 is C 1-8 alkyl, phenyl, wherein the C 1-8 alkyl or phenyl is substituted by 0, 1, 2 or 3 substituents selected from —R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro and C 1-3 haloalkyl; R 3 is —R a , —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(—O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro or C 1-3 haloalkyl; or R 3 is C 1-3 alkyl containing 1 or 2 substituents selected from —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano and nitro; R 4 is —R a , —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro or C 1-3 haloalkyl; R 5 is —R a , —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro or C 1-3 haloalkyl; R 6 is —R a , —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano, nitro or C 1-3 haloalkyl; or R 6 is C 1-3 alkyl containing 1 or 2 substituents selected from —OR a , —SR a , —NR a R a , —CO 2 R a , —OC(═O)R a , —C(═O)NR a R a , —NR a C(═O)R a , —NR a S(═O)R a , —NR a S(═O) 2 R a , —C(═O)R a , —S(═O)R a , —S(═O) 2 R a , halogen, cyano and nitro; and R a is H, C 1-6 alkyl, C 1-3 haloalkyl, phenyl or benzyl, with the provisos that the compound is not methyl-2-(2,6-dichlorophenyl)-1,3-benzoxazole-5-carboxylate or 5-bromomethyl-2-(2,6-dichlorophenyl)-1,3-benzoxazole.