| Pentanoic acid, 4-oxo-, butyl ester |
| levulinic acid, butyl ester |
| 4-ketopentanoic acid butyl ester |
| butyl 4-oxopentanoate |
| butyl laevulinate |
| butyl levulinate |
| n-butyl laevulinate |
| n-butyl levulinate |
| 4-oxo-pentanoic aci butyl ester |
| 4-oxo-pentanoic acid butyl ester |
| Pentanoic acid,4-oxo-,butyl ester |
| Levulinic Acid n-Butyl Ester |
| 4-Keto-n-valeric Acid n-Butyl Ester |
| 4-Oxo-n-valeric Acid n-Butyl Ester |
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