Patent ID: 7816380

Claim:
A compound having the formula (I): or a pharmaceutically acceptable salt thereof, wherein is a single or double bond; R 1 , R 2 , and R 3 are each independently selected from H, halogen and OH; or R 1 and R 2 attached to the same carbon atom together represent oxo; R 4 is H or methyl; R 5 is Cl or F; R 6 is selected from 2-methyltetrazol-5-yl, 5-methyl-1,2,4-oxadiazol-3-yl, 3-methy1,2,4-oxadiazol-5-yl, 5-halomethyl-1,2,4-oxadiazol-3-yl, 3-halomethyl-1,2,4-oxadiazol-5-yl, tetrazol-5-yl, 5-halomethyl-1,2,3-triazolyl, and 5-methyl-1,2,3-triazolyl; R 7 and R 8 are each independently Cl or F; and n is 0 or 1.