英文别名1-ETHOXYCARBONYLMETHYL-2-OXO-CYCLOPENTANECARBOXYLIC ACID ETHYL ESTER; 2-Carbethoxy-2-(carbethoxymethyl)-1-cyclopentanone; Cyclopentaneacetic acid, 1-(ethoxycarbonyl)-2-oxo-, ethyl ester; ethyl 1-(2-ethoxy-2-oxoethyl)-2-oxocyclopentanecarboxylat; Ethyl 1-(2-ethoxy-2-oxoethyl)-2-oxocyclopentane-1-carboxylate; Ethyl 1-(ethoxycarbonyl)-2-oxocyclopentaneacetate