chemistry

Miltirone

Miltirone 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 Miltirone rather than just read about it. In short: Miltirone, also known as rosmariquinone, is an alkaloid found in plants such as Salvia rosmarinus (rosemary) and Salvia miltiorrhiza (danshen, red sage, or Chinese sage). It is a diterpene quinone, a group of compounds that are also known as tanshinones.

Key takeaways

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

Reference excerpt

Miltirone, also known as rosmariquinone, is an alkaloid found in plants such as Salvia rosmarinus (rosemary) and Salvia miltiorrhiza (danshen, red sage, or Chinese sage). It is a diterpene quinone, a group of compounds that are also known as tanshinones.

Pharmacology The drug is a nonbenzodiazepine GABAA receptor positive allosteric modulator, binding to the benzodiazepine allosteric site of the receptor complex with a relatively low affinity (IC50Tooltip half-maximal inhibitory concentration) of 300 nM and acting as a partial agonist. It was orally active in animals and produced anxiolytic-like effects, but in contrast to diazepam, did not produce acute muscle relaxant effects and did not cause dependence or withdrawal with chronic administration. As a tanshinone, miltirone is structurally distinct from other known benzodiazepine receptor ligands.

Development Miltirone was first described in the scientific literature by 1970. It was isolated and described in red sage by 1970 and in rosemary by 1985. The GABAA receptor potentiation of miltirone was described in 1991. The drug was under formal pharmaceutical development by Abbott Laboratories for the treatment of anxiety disorders, but development was discontinued. Synthetic analogues of miltirone with greater potency as GABAA receptor positive allosteric modulators (e.g., affinity (IC50 = 50 nM or improved by 6-fold) have been developed and reported.

Illustrations

Worked examples

Example 1 — a first encounter with Miltirone

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

In research: Miltirone 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 Miltirone 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: Miltirone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abandoned drugs, Diketones, Drugs not assigned an ATC code, so understanding it makes those chapters shorter.
In everyday life: Look for Miltirone 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 Miltirone in 20 minutes

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

Frequently asked questions

What is Miltirone in simple terms?

Why does Miltirone 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 Miltirone?

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 Miltirone.