"In another embodiment, Ar1 is a pyridyl group, n is 0; R3 is ???CH3; R1 is ???F, ???Cl, ???Br, or ???I; Ar2 is a benzothiazolyl group; R8 is -iodo; and R9 is ???H. In another embodiment, the carbon atom to which the R3 group is attached has the R configuration." . . . .