<unk>  (also called Meclofenoxate, and formerly sold under the brand name Lucidril®) is a drug used to treat the symptoms of senile dementia and Alzheimer's Disease. It is a compound of two biochemicals: dimethylaminoethanol (DMAE) and parachlorophenoxyacetate (pCPA).  DMAE is a natural substance, found especially in fish, and also produced in the human brain.  pCPA is a synthetic compound that resembles to a variety of plant hormones called auxins.
Like DMAE, it is a precursor to the neurotransmitter acetylcholine and may increase levels of this chemical in the CNS. It is reported to improve memory and general cognition.
It is also used off-label as a nootropic, often combined with a racetam drug such as piracetam.
Centrophenoxine
Ipriflavone
Felbinac
Amsacrine
Quinine
Nalfurafine
Dimetacrine
Ferruginol