Question:
Which of the following local anaesthetics contains quinoline nucleus:
Which of the following local anaesthetics contains quinoline nucleus:
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Dibucaine is the "Cinchona-like" (Quinoline) anesthetic.
Updated On: May 25, 2026
- Dibucaine
- Benzocaine
- Tetracaine
- Prilocaine
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Local anesthetics are often classified chemically (amides vs. esters) and by their heterocyclic core.
Step 2: Meaning
Quinoline is a heterocyclic aromatic organic compound with the chemical formula $C_9H_7N$.
Step 3: Analysis
Benzocaine and Tetracaine are PABA (ester) derivatives. Prilocaine is an amide derivative of toluidine. Dibucaine (Cinchocaine) is unique because its structure is based on the quinoline (specifically cinchoninic acid) nucleus.
Step 4: Conclusion
Dibucaine is the specific anesthetic containing the quinoline ring. Final Answer: (a)
Local anesthetics are often classified chemically (amides vs. esters) and by their heterocyclic core.
Step 2: Meaning
Quinoline is a heterocyclic aromatic organic compound with the chemical formula $C_9H_7N$.
Step 3: Analysis
Benzocaine and Tetracaine are PABA (ester) derivatives. Prilocaine is an amide derivative of toluidine. Dibucaine (Cinchocaine) is unique because its structure is based on the quinoline (specifically cinchoninic acid) nucleus.
Step 4: Conclusion
Dibucaine is the specific anesthetic containing the quinoline ring. Final Answer: (a)
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