英文别名Methyl 1-methyl-2-oxo-1-cyclopentanecarboxylate; 1-Methyl-2-oxocyclopentanecarboxylic acid methyl ester; Cyclopentanecarboxylic acid, 1-Methyl-2-oxo-, Methyl ester; 1-Methyl-2-oxo-cyclopentancarbonsaeure-methylester; methyl 1-methyl-2-oxocyclopentane-1-carboxylate; Loxoprofen Impurity 54 
