science

Hemi-flyscaline

Hemi-flyscaline 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 Hemi-flyscaline rather than just read about it. In short: Hemi-flyscaline (Hemi-Mescaline-FLY or HMesFLY), also known as 3-dihydrofuranmescaline (3-DHFMescaline; 3-DHF-M), it is also known by other names, including Mescaline-HemiFLY (M-HemiFLY), and also by the abbreviation FM. It is a putative non-hallucinogenic agent and, primarily, a serotonin receptor modulator.

Key takeaways

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

Reference excerpt

Hemi-flyscaline (Hemi-Mescaline-FLY or HMesFLY), also known as 3-dihydrofuranmescaline (3-DHFMescaline; 3-DHF-M), it is also known by other names, including Mescaline-HemiFLY (M-HemiFLY), and also by the abbreviation FM. It is a putative non-hallucinogenic agent and, primarily, a serotonin receptor modulator. This compound belongs to the phenethylamine family and is only partially related to scaline and FLY due to the altered structure of the second furan ring and the presence of two methoxy substituents at the 6 and 7 positions.

Pharmacology

Pharmacodynamics Several studies have been conducted to assess the serotonergic activity of hemi-flyscaline; one such study, carried out in 1999 on rats, showed that it had a moderate affinity for the serotonin 5-HT2A receptor, with an inhibition constant (Ki) of 130 nM, In another behavioural study by David E. Nichols in 2012, also conducted on animals, he noted a "complete loss of efficacy" as well as a ‘loss of mescaline-like potency’, although he made this observation whilst comparing it on an equal footing with other potent hallucinogens; however, in his subsequent 2017 study examining the efficacy of hallucinogens, he concluded that hemi-flyscaline exhibits a very high affinity (with a Ki value of 6.3 nM) for the serotonin 5-HT2A receptor but does not induce behavioural effects.

Chemistry It looks like shiny white crystals.

Synthesis It is synthesised from 2,3,4-trimethoxybenzoic acid by its cyclisation to a 6,7-dimethoxybenzofuran-3-one intermediate, followed by hydrogenation, selective demethylation, the introduction of a cyanomethyl group via the Mannich reaction, re-methylation and final catalytic reduction of the nitrile to an aminoethyl chain.

History Hemi-flyscaline was first described in the scientific literature by David E. Nichols and colleagues in 1995.

See also Scaline FLY (psychedelics) Mescaline-FLY (flyscaline)

References

External links M-hemiFLY (Hemi-flyscaline) - Isomer Design

Illustrations

Worked examples

Example 1 — a first encounter with Hemi-flyscaline

Start with the simplest possible case. Write down what Hemi-flyscaline 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 Hemi-flyscaline 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 Hemi-flyscaline 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 Hemi-flyscaline

In research: Hemi-flyscaline 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 Hemi-flyscaline 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: Hemi-flyscaline is common in secondary-school and first-year university syllabi. It links to neighbouring topics Benzofuran ethers, FLY (psychedelics), Methoxyphenethylamines, so understanding it makes those chapters shorter.
In everyday life: Look for Hemi-flyscaline 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Hemi-flyscaline” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Hemi-flyscaline in 20 minutes

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

Frequently asked questions

What is Hemi-flyscaline in simple terms?

Why does Hemi-flyscaline 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 Hemi-flyscaline?

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 Hemi-flyscaline.