Step 1: Understanding the Concept:
Monepantel represents a novel chemical class of anthelmintics targeting nematode-specific DEG-3 DES-2 nicotinic acetylcholine receptor subunits.
Step 2: Detailed Explanation:
Monepantel (Zolvix):
- Represents the fourth novel class of modern broad-spectrum anthelmintics discovered in 2008, chemically designated as Amino-Acetonitrile Derivatives (AADs).
- Acts as a positive allosteric modulator on nematode-specific DEG-3 ACR-23 nicotinic acetylcholine receptor (nAChR) subunits, causing spastic muscular paralysis in nematodes.
- Completely effective against multi-drug resistant gastrointestinal nematodes resistant to benzimidazoles, levamisole, and macrocyclic lactones.
Step 3: Final Answer:
Therefore, monepantel is a member of Amino-acetonitrile derivatives, matching option (C).