Question

Heterocyclic ring present in acetazolamide is

• A. Thiophene
• B. Thiazole
• C. Thiadiazole
• D. Oxathiazole

Hint:

Acetazolamide = Thia (Sulfur) + Dia (Two Nitrogens) + Azole (Ring).

Answer 1

The Correct Option is C

Step 1: Concept
Acetazolamide is a carbonic anhydrase inhibitor used as a diuretic and for treating glaucoma.

Step 2: Meaning
Its chemical structure includes a five-membered heterocyclic ring containing both nitrogen and sulfur.

Step 3: Analysis
The chemical name of acetazolamide is N-(5-sulfamoyl-1,3,4-thiadiazol-2-yl)acetamide. This confirms the presence of the thiadiazole ring.

Step 4: Conclusion
Thus, the heterocyclic core of acetazolamide is a thiadiazole ring.

Final Answer: (C)