Question:
Identify the class of compound that contains the structure shown in the document image (pentacyclic structure with HO and COOH)
Identify the class of compound that contains the structure shown in the document image (pentacyclic structure with HO and COOH)
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4 Rings = Steroid; 5 Rings = Pentacyclic Triterpenoid.
Updated On: May 25, 2026
- Anthraquinone class
- Steroid class
- Triterpenoid class
- Isothiocyanate class
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Natural products are classified based on their chemical skeleton and biosynthetic origin.
Step 2: Meaning
Triterpenoids are a large class of compounds consisting of six isoprene units, typically forming a pentacyclic ($C_{30}$) structure.
Step 3: Analysis
The image displays a pentacyclic triterpene skeleton (similar to oleanolic or ursolic acid), containing five fused rings. Steroids typically have four fused rings ($C_{27}-C_{29}$).
Step 4: Conclusion
Based on the ring system and carbon count, the structure belongs to the triterpenoid class. Final Answer: (C)
Natural products are classified based on their chemical skeleton and biosynthetic origin.
Step 2: Meaning
Triterpenoids are a large class of compounds consisting of six isoprene units, typically forming a pentacyclic ($C_{30}$) structure.
Step 3: Analysis
The image displays a pentacyclic triterpene skeleton (similar to oleanolic or ursolic acid), containing five fused rings. Steroids typically have four fused rings ($C_{27}-C_{29}$).
Step 4: Conclusion
Based on the ring system and carbon count, the structure belongs to the triterpenoid class. Final Answer: (C)
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