2-Methyl-1,4-dihydroxynaphthalene2-Methyl-1,4-naphthalenediolMenadiolmenadiol2-Methyl-1,4-naphthoquinol2-Methylnaphthalene-1,4-diolReduced menadione2-Methyl-1,4-naphthohydroquinonemenadiol2-MethylhydronaphthoquinoneMethylnaphthohydroquinoneDihydrovitamin K3Reduced vitamin K3Vitamin K3H2