EN
vitamin K2 menaquinone trans-menaquinone 7 (all-E)-2-(3,7,11,15,19,23,27-Heptamethyl-2,6,10,14,18,22,26-octacosaheptaenyl)-3-methyl-1,4-naphthalenedione Menaquinone-7
EN
Vitamin K2 or menaquinone is one of three types of vitamin K, the other two being vitamin K1 and K3.
Wikipedia