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Difference Between Brucine and Strychnine

  • Post last modified:April 9, 2023
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A brief overview of Brucine and Strychnine

Brucine and strychnine are two alkaloid compounds that are found naturally in certain plants. Both compounds are highly toxic and can cause severe health effects, including convulsions, respiratory failure, and even death.

Brucine and strychnine have similar chemical structures and were historically used for medicinal purposes, but their use is now restricted due to their toxicity. Despite their similarities, there are important differences between the two compounds in terms of their chemical properties, toxicity levels, and uses.

Importance of distinguishing between Brucine and Strychnine

It is important to distinguish between brucine and strychnine because they have different properties and effects on the human body, despite their structural similarities. For example, while both compounds are toxic and can cause similar symptoms, the toxic effects of strychnine can be much more severe and even life-threatening in smaller doses compared to brucine.

The uses and applications of these compounds are different; for example, brucine has been used as a muscle relaxant and in the synthesis of certain medications, while strychnine has been used as a rodenticide and as a stimulant. Therefore, distinguishing between these compounds is crucial to ensure proper handling, usage, and regulation to prevent harm to humans and animals.

Brucine

Brucine is an alkaloid compound with the chemical formula C23H26N2O4. It is found naturally in the seeds of plants in the Strychnos family, such as the nux vomica tree and false angostura. Brucine is a bitter-tasting, white crystalline powder that is soluble in alcohol and ether.

Brucine has been used in traditional medicine for its muscle-relaxant and analgesic properties, although its use is now largely limited due to its toxicity. In modern medicine, brucine is used as a reagent in chemical synthesis and in the production of some medications.

Like its closely related compound, strychnine, brucine is highly toxic and can cause convulsions, respiratory failure, and death in high doses. Symptoms of brucine toxicity include muscle twitching, convulsions, and difficulty breathing. Because of its toxicity, the use of brucine is heavily regulated, and it is classified as a Schedule I substance by the U.S. Drug Enforcement Administration.

Strychnine

Strychnine is an alkaloid compound with the chemical formula C21H22N2O2. It is found naturally in the seeds of plants in the Strychnos family, such as the nux vomica tree and poison arrow plant. Strychnine is a bitter-tasting, white crystalline powder that is soluble in water, alcohol, and ether.

Historically, strychnine has been used as a pesticide, rodenticide, and stimulant, as well as a medicinal treatment for a variety of conditions, including respiratory depression and paralysis. Its use is now highly restricted due to its extreme toxicity.

Strychnine works by blocking the action of the neurotransmitter glycine, which leads to uncontrolled muscle contractions and can cause convulsions, respiratory failure, and death in high doses. Symptoms of strychnine toxicity include muscle spasms, rigidity, and difficulty breathing.

Due to its toxicity and potential for abuse, strychnine is classified as a Schedule I substance by the U.S. Drug Enforcement Administration and is heavily regulated. It is also prohibited in many countries for use as a pesticide or rodenticide.

Differences between Brucine and Strychnine

Although brucine and strychnine are similar in their chemical structures and toxicity.

There are several important differences between the two compounds:

  1. Chemical differences: Brucine and strychnine have different chemical formulas (C23H26N2O4 and C21H22N2O2, respectively) and different molecular weights. Additionally, the position of the double bond in their chemical structures is different.
  2. Toxicity differences: While both compounds are highly toxic, strychnine is generally considered to be more toxic than brucine. The lethal dose of strychnine is much lower than that of brucine, and the symptoms of strychnine poisoning can be more severe.
  3. Pharmacological differences: Brucine and strychnine have different effects on the body, despite their similar structures. Brucine has been used as a muscle relaxant and has been shown to have analgesic properties, while strychnine has been used as a stimulant and as a treatment for respiratory depression and paralysis.
  4. Uses and applications differences: The uses and applications of brucine and strychnine differ. Brucine has been used in chemical synthesis and in the production of some medications, while strychnine has been used as a pesticide, rodenticide, and stimulant.

While brucine and strychnine have many similarities, their differences in toxicity, pharmacology, and uses make it important to distinguish between the two compounds in research and regulatory contexts.

Conclusion

Brucine and strychnine are two toxic alkaloid compounds found in certain plants. Despite their similarities in chemical structure and toxicity, there are important differences between the two compounds, including their chemical formulas, toxicity levels, pharmacological effects, and uses.

It is important to distinguish between brucine and strychnine in order to ensure proper handling, usage, and regulation to prevent harm to humans and animals. Due to their toxicity, both compounds are heavily regulated and restricted in their use, and caution should be exercised when handling and using them.

Reference Website

Here are some general resources that may be useful for learning more about brucine and strychnine:

  1. PubChem: Brucine – https://pubchem.ncbi.nlm.nih.gov/compound/brucine
  2. PubChem: Strychnine – https://pubchem.ncbi.nlm.nih.gov/compound/strychnine
  3. National Pesticide Information Center: Strychnine Technical Fact Sheet – http://npic.orst.edu/factsheets/strychtecht.html
  4. U.S. Drug Enforcement Administration: Schedules of Controlled Substances – https://www.deadiversion.usdoj.gov/schedules/
  5. World Health Organization: Brucine – https://www.who.int/ipcs/publications/cicad/en/cicad39.pdf
  6. World Health Organization: Strychnine – https://www.who.int/ipcs/publications/cicad/en/cicad20.pdf