英文别名ethyl 1-methyl-2-oxocyclopentane-1-carboxylate; 1-Methyl-2-oxo-cyclopentanecarboxylic acid ethyl ester; 1-Methyl-2-oxo-cyclopentancarbonsaeure-aethylester; 2-carbethoxy-2-methyl cyclopentanone; 2-ethoxycarbonyl-2-methylcyclopentanone; Cyclopentanecarboxylic acid, 1-methyl-2-oxo-, ethyl ester 
