This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
All are amino steroid non depolarizing neuromuscular except - 
Select and explain. 
A. Pancuronium, B. Pipecuronium, C. Gantacurium, D. Vacuronium
C: Gantacurium
Answer: C: Gantacurium 
Explanation: Stucture Clinical duration Long acting (>50 min) Intermediate (20-50 min) Sho (15-20 min) Ultra-sho (<10-12 min) Steroidal Pancuronium Pipecuronium Vecuronium Rocuronium Benzyliso- quinolinium d-Tubocurarine Metacurine Doxacurium Atracurium Cis-atracurium Mivacurium Onium chlorofumarate Gantacurium Phenolic ether Gallamine Diallyl derivative of toxiferine Alcuronium