Patent ID: 7666885

Claim:
A method for the treatment of Alzheimer's disease, comprising administering to a human in need of such treatment an effective amount of a compound of general formula (II): wherein: R a and R b are independently selected from hydrogen, alkyl, cycloalkyl, haloalkyl, aryl, -(Z) n -aryl, —OR 3 , —C(O)R 3 , —C(O)OR 3 ,-(Z) n —C(O)OR 3 and —S(O) t —, Z is independently selected from —C(R 3 )(R 4 )—, —C(O)—, —O—, —C(═NR 3 )—, —S(O) t — and N(R 3 )—; n is zero, one or two; t is zero, one or two; R 3 and R 4 are independently selected from hydrogen, alkyl, and aryl; and X and Y are independently selected from ═O, and ═S.