发明人王建平,林芳,罗永刚. "Method for the Synthesis of Methotrexate Diethyl Ester" [P]. 中国发明专利, 专利号 CN 112617690 B, 授权公告日 2022-12-26.
Stevens L M, Yamamoto T, Brown S R. "A Process for Preparing High-Purity Methotrexate Diethyl Ester" [P]. US Patent, US 11574525 B2, 2016-06-18.
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