chemistry

RTI-177

RTI-177 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 RTI-177 rather than just read about it. In short: RTI(-4229)-177 (2β-(3-phenylisoxazol-5-yl)-3β-(4-chlorophenyl)tropane, β-CPPIT) is a synthetic stimulant drug from the phenyltropane family, which acts as a DRI with micromolar affinity for the SERT. RTI-177 has an unusually long duration of action of 20 hours or more, substantially longer than the related compound RTI-336 from which it differs in molecular structure only by the absence of a p-methyl group. "the non…

Key takeaways

RTI-177 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect RTI-177 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of RTI-177 from memory before moving on to harder problems.

Reference excerpt

RTI(-4229)-177 (2β-(3-phenylisoxazol-5-yl)-3β-(4-chlorophenyl)tropane, β-CPPIT) is a synthetic stimulant drug from the phenyltropane family, which acts as a DRI with micromolar affinity for the SERT. RTI-177 has an unusually long duration of action of 20 hours or more, substantially longer than the related compound RTI-336 from which it differs in molecular structure only by the absence of a p-methyl group. "the nonselective monoamine transporter inhibitor RTI-126 and the DAT-selective inhibitors RTI-150 and RTI-336 both had a faster rate of onset (30 min) and a short duration of action (4h). In contrast, the nonselective monoamine transporter inhibitor RTI-112 had a slower rate of onset (30–60 min) and a longer duration of action (10h). The DAT-selective inhibitors RTI-171 and RTI-177 also had slower rates of onset (30–120 min), but RTI-171 had a short duration of action (2.5 h) while RTI-177 had a very long duration of action (20 h)."

Comparison of six MAT inhibitors

In the Lindsey paper, RTI-177 was wrongly considered to be a dual inhibitor of the NET, although this was later found out to be incorrect. "In acute toxicity studies in male rats, 3β-(4-chlorophenyl)-2β-[3-(4’-methylphenyl)isoxazol-5-yl]tropane (RTI-336) possessed an LD50 of 180 mg/kg after oral administration, compared with 49 mg/kg for RTI-177 (unpublished results, Howell 2005; Table 9). These results suggested that RTI-336 was a better candidate than RTI-177 for further preclinical development." Also the potency of the heterocyclic compounds is not as great as would be predicted based on in vitro test results.

References

External links Lower reinforcing strength of the phenyltropane cocaine analogs RTI-336 and RTI-177 compared to cocaine in nonhuman primates.

Illustrations

Worked examples

Example 1 — a first encounter with RTI-177

Start with the simplest possible case. Write down what RTI-177 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 RTI-177 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 RTI-177 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 RTI-177

In research: RTI-177 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 RTI-177 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: RTI-177 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Chlorophenyl compounds, Dopamine reuptake inhibitors, Isoxazoles, so understanding it makes those chapters shorter.
In everyday life: Look for RTI-177 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 RTI-177 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RTI-177 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 RTI-177 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RTI-177 in simple terms?

Why does RTI-177 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 RTI-177?

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 RTI-177.