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From Biology-Online Dictionary | Biology-Online Dictionary
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Hexaprenylmenaquinone; prenylmenaquinone-6; 2-methyl-3-hexaprenyl-1,4-naphthoquinone;isolated from putrified fish meal; potency is about 60% of that of phylloquinone (vitamin K1).

Synonym: farnoquinone, vitamin K2, vitamin K2(30).