英文别名1-Piperazinecarboxylicacid,4-methyl-,methylester(7CI,8CI,9CI); Zopiclone Impurity 32; Eszopiclone Impurity 26; Zopiclone Impurity 29; 1-Piperazinecarboxylic acid, 4-methyl-, methyl ester; 4-methyl-1-Piperazinecarboxylic acid,, methyl ester; 4-methyl-piperazine-1-carboxylic acid methyl ester; 4-Methyl-piperazin-1-carbonsaeure-methylester; methyl 4-methyl-1-piperazine carboxylate 
