英文别名Piperazine-2-carboxylic acid methyl ester dihydrochloride; Piperazine-2-Carboxylic Acid Methyl Ester 2HCl; Methyl 2-Piperazinecarboxylate Dihydrochloride; Piperazine-2-carboxylic acid methyl ester DiHCl; methyl piperazine-2-carboxylate,dihydrochloride