Patent ID: 7648966

Claim:
A compound of formula I: or a salt thereof; wherein n is an integer from 0 to 3, the —O(CH 2 ) n R group is in an axial or equatorial position, and R is optionally substituted heteroaryl or optionally substituted aryl wherein the substituent is selected from the group consisting of —Cl, —F, —CF 3 , —CH 3 , —CH 2 CH 3 , —(CH 2 ) m CO 2 R 1 , —(CH 2 ) m OR 2 , (CH 2 ) m CONR 2 R 3 , and —(CH) m NR 1 R 1 , wherein m is an integer from 0 to 3; R 1 is selected from the group consisting of H, alkyl and aryl; and R 2 and R 3 are independently selected from the group consisting of H, alkyl, aryl and acyl, wherein when n=0, R is not 4-aminophenyl.