methyl 2-butyl-3-oxooctanoate

3,5-dibutyl-4-hydroxy-6-pentylpyran-2-one

methyl 2,4-dibutyl-3,5-dioxodecanoate

3,5-dibutyl-6-(6-hydroxyundecan-5-yl)-2-oxo-2H-pyran-4-yl acetate