<prompt> Laundosine is a toxic metabolite ofAtracuriumPancuroniumMivacuriumVecuronium  <response>: Atracurium The unique feature of atracurium is inactivation in plasma by spontaneous nonenzymatic degradation Hofman elimination in addition to that by alkaline ester hydrolysisConsequently, its duration of action is not altered in patients with hepaticrenal insufficiency or hyperdynamic circulation - Preferred muscle relaxant for such patients as well as for neonates and the elderlyAtracurium is metabolized to laudanosine that is responsible for seizuresIt can cause histamine release - Hypotension bronchoconstrictionRefer: Morgan and Mikhails Clinical Anaesthesiology, 5th edition, pg no.216 