science

Salicylmethylecgonine

Salicylmethylecgonine 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 Salicylmethylecgonine rather than just read about it. In short: Salicylmethylecgonine, (2′-Hydroxycocaine) is a tropane derivative drug which is both a synthetic analogue and a possible active metabolite of cocaine. Its potency in vitro is around 10x that of cocaine, although it is only around three times more potent than cocaine when administered to mice (likely owing to it having a higher LogP: 2.89 than that of cocaine: 2.62) Note however that the compound 2′-Acetoxycocaine w…

Key takeaways

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

Reference excerpt

Salicylmethylecgonine, (2′-Hydroxycocaine) is a tropane derivative drug which is both a synthetic analogue and a possible active metabolite of cocaine. Its potency in vitro is around 10x that of cocaine, although it is only around three times more potent than cocaine when administered to mice (likely owing to it having a higher LogP: 2.89 than that of cocaine: 2.62) Note however that the compound 2′-Acetoxycocaine would act as a prodrug to Salicylmethylecgonine in humans, and has a more efficient partition coefficient which would act as a delivery system and would circumvent this reason for a drop in potency. Salicylmethylecgonine also shows increased behavioral stimulation compared to cocaine similar to the phenyltropanes. The hydroxy branch renders the molecule a QSAR of a 10-fold increase over cocaine in its binding potency for the dopamine transporter & a 52-fold enhanced affinity for the norepinephrine transporter. It also has a reduced selectivity for the serotonin transporter though only due to its greater increase at NET binding; its SERT affinity being 4-fold increased compared to cocaine. However, in overall binding affinity (not uptake inhibition) it displaces ligands better across the board than cocaine in all monoamine categories.

Study of molecular modeling inferred that, in addition to intramolecular hydrogen bonding between the adjacent 3β-carbonyl and the 2′-OH ortho group of 185d (i.e. salicylmethylecgonine), that intermolecular hydrogen bonding between its hydroxy ortho substituent and the dopamine transporter was also possible; and was rationalized to be due to its nearness of where the nitrogen and oxygen atoms reside in the para-hydroxy of dopamine itself and its own intrinsic relation to DAT whereby that mutual hydroxyl functionality is mediated in both salicylmethylecgonine and dopamine in a similar manner. That is, at serine residue 359 on DAT, as the distance of the hydroxy to the bridge-nitrogen on salicylmethylecgonine is 7.96 Å (close to that of the distance between the p-OH & the NH2 atoms of dopamine, their distance apart being 7.83 Å). Which may play a role in this analogs increased behavioral stimulation over its parent compound cocaine. The meta-hydroxy group of dopamine, by contrast, has a distance of 6.38 Å from its nitrogen and is believed to engage with the 356 residue on DAT.

See also 4′-Fluorococaine Benzoylecgonine Cocaine reverse ester Ecgonine Methylecgonine cinnamate Norcocaine RTI-160 List of cocaine analogues

References

Illustrations

Worked examples

Example 1 — a first encounter with Salicylmethylecgonine

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

In research: Salicylmethylecgonine 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 Salicylmethylecgonine 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: Salicylmethylecgonine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 3-Hydroxypropenals, Dopamine reuptake inhibitors, Local anesthetics, so understanding it makes those chapters shorter.
In everyday life: Look for Salicylmethylecgonine 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 Salicylmethylecgonine in 20 minutes

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

Frequently asked questions

What is Salicylmethylecgonine in simple terms?

Why does Salicylmethylecgonine 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 Salicylmethylecgonine?

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 Salicylmethylecgonine.