chemistry

HLP005

HLP005 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 HLP005 rather than just read about it. In short: HLP005, or HLP-005, also known as deuterated phenethylamine derivative and formerly as CYB005, is a serotonin receptor agonist and serotonergic psychedelic which is under development for use at non-hallucinogenic doses in the treatment of CNS disorders and neuroinflammation. Interactions Pharmacology Pharmacodynamics HLP005 acts as a serotonin receptor agonist and is a serotonergic psychedelic.

Key takeaways

HLP005 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HLP005 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HLP005 from memory before moving on to harder problems.

Reference excerpt

HLP005, or HLP-005, also known as deuterated phenethylamine derivative and formerly as CYB005, is a serotonin receptor agonist and serotonergic psychedelic which is under development for use at non-hallucinogenic doses in the treatment of CNS disorders and neuroinflammation.

Interactions

Pharmacology

Pharmacodynamics HLP005 acts as a serotonin receptor agonist and is a serotonergic psychedelic. In addition, HLP005 may also inhibit serotonin and dopamine reuptake.

Chemistry

HLP005 is a phenethylamine derivative and a deuterated compound. The exact chemical structure of HLP005 does not yet seem to have been disclosed. However, it appears to be closely related to CYB210010 (CYB2108; 2C-T-36 or 2C-T-TFM), which itself is non-deuterated. In addition, HLP005's developer has patent protection for HLP005, indicating that its chemical structure has been published in the patent literature. Some notable phenethylamines patented by Helus Pharma include the non-deuterated CYB2108 (2C-T-36) and its deuterated form CYB2108D (fully deuterated methoxy groups at 2 and 5 positions).

Research HLP005 is under development by Helus Pharma (formerly Cybin). As of November 2025, it is in the preclinical research stage of development for treatment of CNS disorders. The drug was also under development for treatment-resistant psychiatric disorders, but development for this indication was discontinued in November 2025. Other related drugs under development by Helus Pharma include the deuterated tryptamines deupsilocin (HLP003; CYB003) and deudimethyltryptamine (HLP004; CYB004).

See also Substituted phenethylamine List of investigational hallucinogens and entactogens Deumescaline α,α-Dideuterophenethylamine

References

External links Development Pipeline – Helus Pharma

Worked examples

Example 1 — a first encounter with HLP005

Start with the simplest possible case. Write down what HLP005 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 HLP005 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 HLP005 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 HLP005

In research: HLP005 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 HLP005 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: HLP005 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 5-HT2A agonists, Deuterated psychedelics, Drugs with undisclosed chemical structures, so understanding it makes those chapters shorter.
In everyday life: Look for HLP005 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 HLP005 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HLP005 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 HLP005 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HLP005 in simple terms?

Why does HLP005 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 HLP005?

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 HLP005.