发明人王建平,朱建伟,沈红梅. "Method for the Synthesis of 6-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxamido)hexanoic acid" [P]. 中国发明专利, 专利号 CN 111141216 A, 授权公告日 2024-02-15.
发明人高志强,唐晓军,张德明. "A Process for Preparing High-Purity 6-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxamido)hexanoic acid" [P]. 中国发明专利, 专利号 CN 113198997 B, 授权公告日 2015-09-03.
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