See also: ménaquinone

English edit

 
Chemical structure of menaquinone
 
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Etymology edit

From me(thyl) +‎ na(phtho)quinone.

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Noun edit

menaquinone (plural menaquinones)

  1. (biochemistry, pharmacology) A pale yellow crystalline naphthoquinone C41H56O2 that is obtained especially from putrefied fish meal and produced by bacteria in the large intestine and essential for the blood-clotting process. It is much more unsaturated than vitamin K1 and slightly less active biologically, and is an isoprenoid derivative of menadione.

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