英文别名Loxoprofen Impurity 13; 1-[4-(1-Methoxycarbonyl-ethyl)-benzyl]-2-oxo-cyclopentanecarboxylic acid methyl ester; Benzeneacetic acid, 4-[[1-(methoxycarbonyl)-2-oxocyclopentyl]methyl]-α-methyl-, methyl ester; methyl 1-(4-(1-methoxy-1-oxopropan-2-yl)benzyl)-2-oxocyclopentanecarboxylate; Loxoprofen Impurity L 
