The invention provides compounds of the formula:and pharmaceutically acceptable salts or prodrugs thereof, wherein, n, X, Y, R1, R2, R3, R4 and R5 are as defined herein. The assembly includes a molding having a foot, a first arm, and a second arm. The qualification or common verification system, which is available via the Internet or some other communication network, provides circuit designers with an interface where circuit designs can be submitted for automatic qualification. The front panel is affixed to the flap having the second display rack hole, preferably with adhesive or by heat sealing, to create an area that seals the display rack holes from the compartment. In one embodiment, a single garbage collector is run on the virtual heap address space.