chemistry

Vinyltestosterone

Vinyltestosterone 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 Vinyltestosterone rather than just read about it. In short: Vinyltestosterone (also known as 17α-vinyltestosterone, 17α-vinylandrost-4-en-17β-ol-3-one, and 17α-hydroxypregna-4,20-dien-3-one) is a synthetic anabolic–androgenic steroid (AAS) that was never marketed. However, two 19-nortestosterone derivatives of vinyltestosterone, norvinisterone (17α-vinyl-19-nortestosterone) and norgesterone (17α-vinyl-δ5(10)-19-nortestosterone), have been marketed.

Key takeaways

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

Reference excerpt

Vinyltestosterone (also known as 17α-vinyltestosterone, 17α-vinylandrost-4-en-17β-ol-3-one, and 17α-hydroxypregna-4,20-dien-3-one) is a synthetic anabolic–androgenic steroid (AAS) that was never marketed. However, two 19-nortestosterone derivatives of vinyltestosterone, norvinisterone (17α-vinyl-19-nortestosterone) and norgesterone (17α-vinyl-δ5(10)-19-nortestosterone), have been marketed. They are used as progestins for female hormonal contraception, rather than as AAS. Vinyltestosterone is a relatively weak AAS. In one study, it showed approximately one-third and one-fifth of the respective androgenic and anabolic activity of other AAS such as nandrolone (19-nortestosterone), methyltestosterone (17α-methyltestosterone), and ethyltestosterone (17α-ethyltestosterone) in castrated male rats, whereas ethisterone (17α-ethynyltestosterone) showed almost no androgenic and anabolic activity (only 1/20 the anabolic potency of vinyltestosterone). Additionally, in women with metastatic breast cancer, vinyltestosterone was found to be ineffective in treating the disease (unlike other AAS such as testosterone propionate or fluoxymesterone) and produced little or no virilization in the women at a dosage of 100 mg intramuscularly three times per week.

Illustrations

Worked examples

Example 1 — a first encounter with Vinyltestosterone

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

In research: Vinyltestosterone 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 Vinyltestosterone 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: Vinyltestosterone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abandoned drugs, Alkene derivatives, Androgens, so understanding it makes those chapters shorter.
In everyday life: Look for Vinyltestosterone 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 Vinyltestosterone in 20 minutes

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

Frequently asked questions

What is Vinyltestosterone in simple terms?

Why does Vinyltestosterone 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 Vinyltestosterone?

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 Vinyltestosterone.