1,4-Naphthalenedione, 2-methyl-3-(3-methyl-2-butenyl)- 1,4-Naphthoquinone, 2-methyl-3-(3-methyl-2-butenyl)- 957-78-8 Lepachol acetate Menaquinone 1 NSC123509 Vitamin K2(5) Vitamin MK 1 Vitamins (K2(5))