CAS: 957-78-8 Molecular Formula: C16H16O2 Molecular Weight (g/mol): 240.3 Synonym: 2-Methyl-3-(3-methyl-2-buten-1-yl)-1,4-naphthalenedione,2-Methyl-3-(3-methyl-2-butenyl)-1,4-naphthalenedione,2-Methyl-3-(3-methyl-2-butenyl)-1,4-naphthoquinone,Menaquinone 1,NSC 123509,Vitamin MK 1 IUPAC Name: 2-methyl-3-(3-methylbut-2-enyl)naphthalene-1,4-dione SMILES: CC(=CCC1=C(C)C(=O)c2ccccc2C1=O)C