Mivacurium

Mivacurium is a bisbenzylisoquinolinium based neuromuscular blocker or muscle relaxant.

In the TV series "Nip Tuck", a serial rapist ("The Carver") used "a modified form of mivacurium chloride" for disabling his victims while violating them. It has been discontinued. .

It's a benzyl-Isoquinolinium agent.