2-Acetyl-5-hydroxy-3-oxo-4-hexenoic acid, .delta.-lactone 2H-Pyran-2,4(3H)-dione, 3-acetyl-6-methyl- 3-Acetyl-6-methyl-2,4-pyrandione 3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione 3-Acetyl-6-methyldihydropyrandione-2,4 3-Acetyl-6-methylpyrandione-2,4 4-Hexenoic acid, 2-acetyl-5-hydroxy-3-oxo-, .delta.-lactone 520-45-6 Acetic acid, dehydro- DHA DHS Dehydracetic acid Dehydroacetic acid Methylacetopyronone NSC8770 WLN: T6OV DV CHJ CV1 F1