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chemistry

Hexestrol

Hexestrol 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 Hexestrol rather than just read about it. In short: Hexestrol, sold under the brand name Synestrol among others, is a nonsteroidal estrogen which was previously used for estrogen replacement therapy and in the treatment of certain hormone-dependent cancers as well as gynecological disorders but is mostly no longer marketed. It has also been used in the form of esters such as hexestrol diacetate (brand name Sintestrol) and hexestrol dipropionate (brand name Hexanoestr…

Hexestrol — main illustration
Hexestrol — illustration

Key takeaways

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

Reference excerpt

Hexestrol, sold under the brand name Synestrol among others, is a nonsteroidal estrogen which was previously used for estrogen replacement therapy and in the treatment of certain hormone-dependent cancers as well as gynecological disorders but is mostly no longer marketed. It has also been used in the form of esters such as hexestrol diacetate (brand name Sintestrol) and hexestrol dipropionate (brand name Hexanoestrol). Hexestrol and its esters are taken by mouth, held under the tongue, or via injection into muscle.

Medical uses Hexestrol has been used in estrogen replacement therapy, for the treatment of breast cancer in women and prostate cancer in men, and for the treatment of certain gynecological disorders.

Pharmacology

Pharmacodynamics Hexestrol has approximately 302% and 234% of the affinity of estradiol for the estrogen receptors (ERs) ERα and ERβ, respectively. The affinity of hexestrol for the ERs is said to be similar to or slightly higher than that of estradiol. Along with diethylstilbestrol, hexestrol has been said to be one of the most potent estrogens known. The total endometrial proliferation dose per cycle of different forms of hexestrol are 70 to 100 mg for oral hexestrol, 45 mg for sublingual hexestrol diacetate, and 25 mg for hexestrol dipropionate by intramuscular injection. These doses are fairly similar to those of estradiol and its esters. Hexestrol induces mammary gland development in rodents similarly to other estrogens. Nonsteroidal estrogens like diethylstilbestrol, which is closely related structurally to hexestrol, are known to have dramatically disproportionate estrogenic effects in the liver and on liver protein synthesis.

Pharmacokinetics

The pharmacokinetics and distribution of hexestrol have been studied with intravenous injection of aqueous solution in women and with subcutaneous injection of oil solution in female goats and sheep.

Chemistry

Hexestrol, also known as dihydrodiethylstilbestrol, is a synthetic nonsteroidal estrogen of the stilbestrol group related to diethylstilbestrol. Esters of hexestrol include hexestrol diacetate, hexestrol dicaprylate, hexestrol diphosphate, and hexestrol dipropionate.

History Hexestrol was first described by Campbell, Dodds, and Lawson in 1938. It was isolated from the demethylation products of anethole.

Society and culture

Generic names Hexestrol is the generic name of the drug and its INNTooltip International Nonproprietary Name.

Brand names Hexestrol has been marketed under a variety of brand names including Synestrol, Synoestrol, Estrifar, and Estronal, among others.

Availability Hexestrol has mostly been discontinued and remains available in only a handful of countries. Esters of hexestrol which have been marketed include hexestrol diacetate, hexestrol dicaprylate, hexestrol diphosphate, and hexestrol dipropionate.

References

Illustrations

Hexestrol illustration
Hexestrol: Distribution of hexestrol radioactivity in blood and tissues after a subcutaneous injection of a physiological dose of tritium-labeled hexestrol in oil solution in five juvenile female goats.[13] Points are one animal each.[13] With the exception of skeletal muscle, tissues with a radioactivity concentration of less than 15% of that of the endometrium are not shown.[13] Hexestrol is concentrated in target tissues such as the uterus and vagina due to binding to estrogen receptors.[14]
Distribution of hexestrol radioactivity in blood and tissues after a subcutaneous injection of a physiological dose of tritium-labeled hexestrol in oil solution in five juvenile female goats.[13] Points are one animal each.[13] With the exception of skeletal muscle, tissues with a radioactivity concentration of less than 15% of that of the endometrium are not shown.[13] Hexestrol is concentrated in target tissues such as the uterus and vagina due to binding to estrogen receptors.[14]

Worked examples

Example 1 — a first encounter with Hexestrol

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

In research
Hexestrol 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 Hexestrol 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
Hexestrol is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Hydroxyphenyl compounds, Stilbenoids, Synthetic estrogens, so understanding it makes those chapters shorter.
In everyday life
Look for Hexestrol 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 Hexestrol in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hexestrol means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hexestrol out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hexestrol in simple terms?

Hexestrol, sold under the brand name Synestrol among others, is a nonsteroidal estrogen which was previously used for estrogen replacement therapy and in the treatment of certain hormone-dependent cancers as well as gynecological disorders but is mostly no longer marketed. It has also been used in…

Why does Hexestrol 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 Hexestrol?

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 Hexestrol.

Tags

  • 4-Hydroxyphenyl compounds
  • Stilbenoids
  • Synthetic estrogens
  • Withdrawn drugs

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