Vitamin K 3

2-Methyl-1,4-naphthalenedione; 2-Methyl-1,4-naphthoquinone; 2-Methylnaphthoquinone; Menadione bisulfite; Menadione sodium bisulfite; Menadione sodium bisulfite, trihydrate; Vicasol; Vikasol; Vitamin K3; Vitamin K3 sodium bisulfite
A synthetic naphthoquinone without the isoprenoid side chain and biological activity, but can be converted to active vitamin K2, menaquinone, after alkylation in vivo.