Atracurium

Atracurium is a diester compound derived from pentane-1,5-diol, with both hydroxyl groups substituted by 3-[1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-3,4-dihydroisoquinolinium-2(1H)-yl]propanoyl groups. It functions as a muscle relaxant and nicotinic antagonist, and is a quaternary ammonium ion and diester.