Complete the following SN2 reaction by providing structures for the necessary starting materials. 
Definitions:
Proactive Interference
A phenomenon where old information inhibits the ability to remember new information.
Alzheimer's Disease
A progressive neurological disorder that causes memory loss, cognitive decline, and ultimately, loss of ability to perform even simple tasks, due to brain cell degeneration.
Proactive Interference
The phenomenon where old memories interfere with the recall of new information.
Hindsight Bias
The tendency to believe, after an event has occurred, that one would have foreseen or predicted the outcome, often referred to as the "I-knew-it-all-along" effect.
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