Synonym: Vitamin K2, Vitamin MK4,menaquinone, menaquinon-4, menatetrenone, menatetren, menatetrenona, menatetrenonum, 2-methyl-3-[(2'E,6'E,10'E)-3',7',11',15' -tetramethylhexadeca-2',6',10',14'- tetraen-1'-yl]-1,4-naphthalenedione;CAS Number: 863-61-6...