(2,3-Epoxyphytyl)menaquinone 1a,7a-Dihydro-1a-methyl-7a-(3,7,11,15-tetramethyl-2-hexadecenyl)naphth(2,3-b) oxirene-2,7-dione 25486-55-9 EINECS 247-022-9 Phylloquinone 2,3-epoxide Vitamin K1 oxide