Brown S R, Klinger H, Roberts E F. "Method for the Synthesis of 2,5,7,8-Tetramethyl-2-(piperazine-1-carbonyl)-3,4-dihydro-2H-1-benzopyran-6-ol hydrochloride" [P]. US Patent, US 10600252 B2, 2020-03-17.
发明人张德明,冯建国,赵玉洁. "A Process for Preparing High-Purity 2,5,7,8-Tetramethyl-2-(piperazine-1-carbonyl)-3,4-dihydro-2H-1-benzopyran-6-ol hydrochloride" [P]. 中国发明专利, 专利号 CN 113421729 A, 授权公告日 2024-10-22.
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