Synonyms: 1,4-Naphthalenedione,2-methyl-3-(3,7,11,15,19-pentamethyl-2,6,10,14,18-eicosapentaenyl)-, (all-E)-;1,4-Naphthalenedione,2-methyl-3-[(2E,6E,10E,14E)-3,7,11,15,19-pentamethyl-2,6,10,14,18-eicosapentaenyl]-(9CI); 1,4-Naphthoquinone,2-methyl-3-(3,7,11,15,19-pentamethyl-2,6,10,14,18-eicosapentaenyl)- (6CI,7CI,8CI);2-Methyl-3-farnesylgeranyl-1,4-naphthoquinone; Menaquinone; Menaquinone 5;Vitamin K2(25); Vitamin MK 5