1-(5-methylfuran-2-yl)propan-1-ol

3-hydroxyoctane-2,5-dione

4-hydroxy-5-methyl-4-cyclopentene-1,3-dione

3,5,5-triethoxy-2-methylcyclopent-2-en-1-one

4-ethyl-5-methylcyclopent-4-ene-1,3-dione