science

Norpsilocin

Norpsilocin is a science 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 Norpsilocin rather than just read about it. In short: Norpsilocin, also known as 4-hydroxy-N-methyltryptamine (4-HO-NMT), is a tryptamine alkaloid recently discovered in 2017 in the psychedelic mushroom Psilocybe cubensis. It is hypothesized to be a dephosphorylated metabolite of baeocystin.

Key takeaways

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

Reference excerpt

Norpsilocin, also known as 4-hydroxy-N-methyltryptamine (4-HO-NMT), is a tryptamine alkaloid recently discovered in 2017 in the psychedelic mushroom Psilocybe cubensis. It is hypothesized to be a dephosphorylated metabolite of baeocystin.

Pharmacology Norpsilocin was found to be a near full agonist of the 5-HT2A receptor and was found to be more potent than psilocin. It also has affinity for other serotonin receptors. Moreover, it has been found to cross the blood–brain barrier in animals and to have good metabolic stability similarly to psilocin. Norpsilocin has shown psilocin-related peripheral effects in animals, including decreased spinal reflexes such as knee jerk response (opposite effect to psilocin), antiserotonergic activity (14% of that of psilocin), and pressor activity (70% of that of psilocin). Surprisingly however, in spite of its serotonin 5-HT2A receptor agonism and psilocin-like effects, norpsilocin failed to induce the head-twitch response, a behavioral proxy of psychedelic effects, in animals. Likewise, norbaeocystin and aeruginascin failed to induce the head-twitch response. Only psilocybin was effective in this regard. In any case, norbaeocystin showed antidepressant-like activity (forced swim test) similarly to psilocybin and fluoxetine in spite of its putative non-hallucinogenic nature. Norpsilocin itself was not tested in this assay. A 2025 animal study found that both baeocystin and norpsilocin are peripherally selective with very limited ability to cross the blood–brain barrier.

Chemistry

Analogues

4-AcO-NMT 4-AcO-NMT, the acetate ester of NMT, has been described.

Research Norpsilocin is being evaluated under the developmental code name PLZ-1017 for the possible treatment of pervasive developmental disorders in children.

See also Substituted tryptamine List of investigational hallucinogens and entactogens 4-Hydroxytryptamine

References

External links 4-HO-NMT (Norpsilocin) - Isomer Design

Illustrations

Worked examples

Example 1 — a first encounter with Norpsilocin

Start with the simplest possible case. Write down what Norpsilocin claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Norpsilocin 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 Norpsilocin 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 Norpsilocin

In research: Norpsilocin appears in science 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 Norpsilocin 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: Norpsilocin is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Hydroxytryptamines, Drugs not assigned an ATC code, Experimental non-hallucinogens, so understanding it makes those chapters shorter.
In everyday life: Look for Norpsilocin 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 Norpsilocin in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Norpsilocin 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 Norpsilocin out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Norpsilocin in simple terms?

Why does Norpsilocin matter?

Because it connects several science 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 Norpsilocin?

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 Norpsilocin.