发明人胡光,韩伟,冯建国. "一种4-甲基-2-氧代螺[二氢吲哚-3,3'-吡咯烷]-1'-羧酸叔丁酯的合成方法" [P]. 中国发明专利, 专利号 CN 112475631 A, 授权公告日 2020-09-09.
发明人何建平,郑宇鹏,孙丽萍. "Method for the Synthesis of tert-Butyl 4-methyl-2-oxospiro[indoline-3,3'-pyrrolidine]-1'-carboxylate" [P]. 中国发明专利, 专利号 CN 111865403 B, 授权公告日 2021-03-23.
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