发明人徐明华,陈志强,周伟. "Method for the Synthesis of Ethyl 4-[amino(imino)methyl]piperazine-1-carboxylate sulfate" [P]. 中国发明专利, 专利号 CN 116715163 A, 授权公告日 2021-12-06.
Hughes D C, Lee S K, Patel M V. "A Process for Preparing High-Purity Ethyl 4-[amino(imino)methyl]piperazine-1-carboxylate sulfate" [P]. US Patent, US 9736865 B2, 2018-05-12.
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