3,4-Dihydro-6,7-dimethoxy-1-(3,4,5-trimethoxybenzyl)isoquinoline

While not Mivacurium itself (which is a bis-quaternary ammonium compound), this structure is built upon to form the intricate architecture of drugs like Mivacurium. The compound 3,4-Dihydro-6,7-dimethoxy-1-(3,4,5-trimethoxybenzyl)isoquinoline serves as a key intermediate or precursor in the synthesis of neuromuscular blocking agents, including compounds related to Mivacurium, by providing the core tetrahydroisoquinoline structure needed for these complex molecules, often involved in creating specific stereocenters for pharmacological activity.