<prompt> Laudanosine is metabolite of which of the following?CisatracuriumAtracuriumPancuroniumGallamine  <response>: Laudanosine is a principal metabolite of atracurium, it has no neuromuscular blocking effects. Laudanosine freely crosses the blood brain barrier and in high concentration act as a CNS stimulant. It is primarily cleared through the liver. 