Vitamin K3

Also Known As: 

Menadione

Menaphthone

β-Methyl-1,4-naphthoquinone

2-Methyl-1,4-naphthodione

2-Methyl-1,4-naphthoquinone

Overview: Vitamin K3, also known as menadione, is an analog of 1,4-naphthoquinone with a methyl group in the 2-position. It is a fat-soluble vitamin precursor that is converted into menaquinone in the liver.