2-Methyl-1,4-naphthoquinone; 1,4-Dihydro-1,4-dioxo-2-methylnaphthalene; 2-Methyl-1,4-naphthalenedione; Aquakay; Aquinone; Hemodal; K-Thrombyl; K-Vitan; Kaergona; Kanone; Kappaxan; Kappaxin; Karcon; Kareon; Kativ-G; Kayklot; Kaykot; Kaynone; Kayquinone; Kipca; Kipca-Oil Soluble; Klottone; Koaxin; Kolklot; MNQ; Menadion; Menadione; Menaphthon; Menaphthone; Menaquinone 0; Mitenon; Mitenone; NSC 4170; Panosine; Prokayvit; Synkay; Thyloquinone;