CHRNA4
CHRNA4 nicotinic receptor — the molecular target that 1 compounds in the wiki act on.
In one line: A nicotine receptor that, when activated, sharpens attention and reaction time.
CHRNA4 is part of the nicotinic acetylcholine receptor — one of the docks nicotine plugs into. Activating it genuinely sharpens attention, working memory, and reaction speed, which is why nicotine (separated from smoking) has real cognitive effects.
The problem is the same receptor sits in the brain's reward circuit, so activating it is strongly addictive. That's the trade-off: real focus benefit, real dependence risk. For most people the addiction isn't worth it.