chemistry

PRL-8-53

PRL-8-53 is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand PRL-8-53 rather than just read about it. In short: PRL-8-53 is a nootropic substituted phenethylamine that has been shown to act as a hypermnesic drug in humans; it was first synthesized by medical chemistry professor Nikolaus Hansl at Creighton University in the 1970s as part of his work on amino ethyl meta benzoic acid esters. Mechanism of action The exact mechanism of action of PRL-8-53 remains unknown.

Key takeaways

PRL-8-53 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect PRL-8-53 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PRL-8-53 from memory before moving on to harder problems.

Reference excerpt

PRL-8-53 is a nootropic substituted phenethylamine that has been shown to act as a hypermnesic drug in humans; it was first synthesized by medical chemistry professor Nikolaus Hansl at Creighton University in the 1970s as part of his work on amino ethyl meta benzoic acid esters.

Mechanism of action The exact mechanism of action of PRL-8-53 remains unknown. Doses up to 200 mg/kg are not observed to have stimulant properties, and a dosage of 20 mg/kg does not potentiate the effects of dextroamphetamine in rats. It displays possible cholinergic properties, and potentiates dopamine while partially inhibiting serotonin. PRL-8-53 reverses the catatonic and ptotic effects of reserpine.

Toxicity PRL-8-53 is relatively non-toxic, with an oral LD50 in mice of 860 mg/kg, giving the drug a high therapeutic index. Doses above 8 mg/kg have brief hypotensive effects in canines. High doses depress motor activity in the rat and mouse, with the ED50 for a 50% reduction in motor activity of mice at 160 mg/kg. PRL-8-53 displays spasmolytic effects.

Reasons for discontinuation PRL-8-53's development was not pursued further, despite not exhibiting side effects in human or animal trials that would warrant discontinuation. Termination of further research may have been due to factors including the retirement of Dr. Nikolaus Hansl and a lawsuit filed between Hansl and Creighton University in 1985.

Hansl v. Creighton University On July 1, 1985, Dr. Nikolaus Hansl entered into a settlement agreement with Creighton University. The terms of the agreement guaranteed Dr. Hansl access to his laboratory facilities and office space at the university for a period of 2 years. Upon returning from a 4-month absence. Hansl found that the refrigerator he had used to store various experimental compounds had been unplugged, purportedly rendering the compounds unusable.

Patent Dr. Hansl's patent for the synthesis of PRL-8-53 has expired.

Synonyms Methyl 3-(2-(benzylmethylamino)ethyl)benzoate hydrochloride 3-(2-benzylmethylaminoethyl) benzoic acid methyl ester hydrochloride 3-(2-(Methyl(phenylmethyl)amino)ethyl)benzoic acid methyl ester hydrochloride

Illustrations

Worked examples

Example 1 — a first encounter with PRL-8-53

Start with the simplest possible case. Write down what PRL-8-53 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to PRL-8-53 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about PRL-8-53 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of PRL-8-53

In research: PRL-8-53 appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses PRL-8-53 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: PRL-8-53 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Benzoate esters, Benzyl compounds, Drugs not assigned an ATC code, so understanding it makes those chapters shorter.
In everyday life: Look for PRL-8-53 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study PRL-8-53 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PRL-8-53 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain PRL-8-53 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PRL-8-53 in simple terms?

Why does PRL-8-53 matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study PRL-8-53?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on PRL-8-53.