173469-70-0 4H-1-Benzopyran-6-acetic acid, 2,3-dimethyl-alpha-ethyl-4-oxo-, methyl ester Methyl 2,3-dimethyl-alpha-ethyl-4-oxo-4H-1-benzopyran-6-acetate Methyl 2-(2,3-dimethylchromon-6-yl)butanoate