发明人高志强,冯建国,张德明. "Method for the Synthesis of (E)-tert-Butyl (4-oxo-3-phenyl-1,3,8-triazaspiro[4.5]decan-2-ylidene)carbamate oxalate" [P]. 中国发明专利, 专利号 CN 115025420 B, 授权公告日 2023-10-20.
发明人何建平,罗永刚,冯建国. "A Process for Preparing High-Purity (E)-tert-Butyl (4-oxo-3-phenyl-1,3,8-triazaspiro[4.5]decan-2-ylidene)carbamate oxalate" [P]. 中国发明专利, 专利号 CN 112212748 B, 授权公告日 2016-07-07.
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