This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
[{'content': 'Which of the following is not an amino steroid derivative – \nSelect and explain. \nA. Alcuronium, B. Vecuronium, C. Pancuronium, D. Pipecuronium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vecuronium, Pancuronium, Pipecuronium are aminosteroids. Alcuronium is benzylisoquinolone.', 'role': 'assistant'}]