| 1 | Gamma-ketovaleric acid |
| 2 | Levulic acid |
| 3 | Levulinsaeure |
| 4 | Laevulinic acid |
| 5 | 4-oxovaleric acid |
| 6 | 4-ketovaleric acid |
| 7 | 3-acetylpropionic acid |
| 8 | Levulinic acid |
| 9 | Beta-acetylpropionic acid |
| 10 | 3-ketobutane-1-carboxylic acid |
| 11 | Laevulinsaeure |
| 12 | Leva |
| 13 | Pentanoic acid |
| 14 | Pentanoate |
| 15 | Valerate |
| 16 | Valeric acid |
| 17 | Valerianic acid |
| 18 | N-pentanoate |
| 19 | N-valeric acid |
| 20 | Ch3-[ch2]3-cooh |
| 21 | Pentoic acid |
| 22 | Valeriansaeure |
| 23 | 1-butanecarboxylic acid |
| 24 | N-bucooh |
| 25 | N-pentanoic acid |
| 26 | Propylacetic acid |
| 27 | Valeric acid, normal |