.beta.-Acetylpropionic acid .gamma.-Ketovaleric acid 123-76-2 3-Acetylpropionic acid 4-Ketovaleric acid 4-Oxopentanoic acid 4-Oxovaleric acid Acetopropionic acid LEVA Laevulinic acid Levulic acid Levulinic acid NSC3716 Pentanoic acid, 4-oxo- Propionic acid, 3-acetyl- Usaf cz-1 VALERIC ACID, 4-OXO-(LEVULINIC ACID) Valeric acid, 4-oxo- WLN: QV2V1