methonium
noun
me·tho·ni·um
mə-ˈthō-nē-əm 
: any of several bivalent doubled substituted ammonium ions (as decamethonium or hexamethonium) in which the two quaternary nitrogen atoms are separated by a polymethylene chain
methonium salts used in the treatment of hypertension
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“Methonium.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/methonium. Accessed 22 Dec. 2024.
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