L-741,626 is a drug which acts as a potent and selective

antagonist An antagonist is a character in a story who is presented as the main enemy or rival of the protagonist and is often depicted as a villain.dopamine Dopamine (DA, a contraction of 3,4-dihydroxyphenethylamine) is a neuromodulatory molecule that plays several important roles in cells. It is an organic chemical of the catecholamine and phenethylamine families. It is an amine synthesized ...

receptor Receptor may refer to: * Sensory receptor, in physiology, any neurite structure that, on receiving environmental stimuli, produces an informative nerve impulse *Receptor (biochemistry), in biochemistry, a protein molecule that receives and respond ...

D₂. It has good selectivity over the related D₃ and D₄ subtypes and other receptors. L-741,626 is used for laboratory research into brain function and has proved particularly useful for distinguishing D₂ mediated responses from those produced by the closely related D₃ subtype, and for studying the roles of these subtypes in the action of

cocaine Cocaine is a tropane alkaloid and central nervous system stimulant, derived primarily from the leaves of two South American coca plants, ''Erythroxylum coca'' and ''Erythroxylum novogranatense, E. novogranatense'', which are cultivated a ...

and

amphetamine Amphetamine (contracted from Alpha and beta carbon, alpha-methylphenethylamine, methylphenethylamine) is a central nervous system (CNS) stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, an ...

s in the brain.

References

D2 antagonists Indoles 4-Phenylpiperidines Tertiary alcohols 4-Chlorophenyl compounds {{nervous-system-drug-stub