Vitamin K 3

**Definition:** A synthetic naphthoquinone without the isoprenoid side chain and biological activity, but can be converted to active vitamin K2, menaquinone, after alkylation in vivo.

**Tree numbers:** - D02.455.426.559.847.638.721.374.922 - D02.455.849.291.523.500.922 - D02.806.550.875 - D04.615.638.721.374.922

**Synonyms:** - 2-Methyl-1,4-naphthalenedione - 2-Methyl-1,4-naphthoquinone - 2-Methylnaphthoquinone - Menadione - Vitamin K3