Synonyms: 2-(Methoxycarbonyl)cyclopentanone, 2-Carbomethoxycyclopentanone, 2-Cyclopentanonecarboxylic Acid Methyl Ester, 2-Oxocyclopentanecarboxylic Acid Methyl Ester, Cyclopentenone-2-carboxylic Acid Methyl Ester, Methyl 2-Cyclopentanone-1-carboxylate, Methyl 2-Oxo-1-cyclopentanecarboxylate, Methyl 2-oxocyclopentacarboxylate, Methyl 2-Oxocyclopentanecarboxylate