发明人郭海燕,高志强,韩伟. "Method for the Synthesis of 1'-tert-Butyl 6-methyl 8-bromo-4-oxospiro[chroman-2,4'-piperidine]-1',6-dicarboxylate" [P]. 中国发明专利, 专利号 CN 111018213 A, 授权公告日 2020-10-20.
发明人陈志强,郑宇鹏,赵玉洁. "A Process for Preparing High-Purity 1'-tert-Butyl 6-methyl 8-bromo-4-oxospiro[chroman-2,4'-piperidine]-1',6-dicarboxylate" [P]. 中国发明专利, 专利号 CN 110054229 A, 授权公告日 2023-03-03.
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