Patent ID: 7598265

Claim:
A pharmaceutical composition comprising a first compound of the formula wherein R 1 is (C 1 -C 8 ) branched or unbranched alkyl; a (C 1 -C 8 ) substituted or unsubstituted carbocyclic ring; branched or unbranched haloalkyl, a substituted or unsubstituted aryl, or a substituted or unsubstituted (CH 2 ) p -aryl, where p is 1, 2, 3, or 4; R 2 and R 3 , taken together, form a substituted or unsubstituted piperidine, pyrrolidine, azepane, aziridine, or azetidine ring; and n is 1, 2, 3, 4, 5 or 6; and pharmaceutically acceptable salts and/or esters thereof, the first compound being present in an amount which if administered alone does not substantially enhance memory; and a second compound which is a cholinesterase or acetylcholinesterase inhibitor and is present in an amount which if administered alone does not substantially enhance memory.