发明人孙丽萍,王建平,冯建国. "Method for the Synthesis of 2,2'-Dihydroxy-4,4'-dimethoxy benzophenone-5-sulfonic acid s" [P]. 中国发明专利, 专利号 CN 113327547 B, 授权公告日 2022-07-13.
发明人郭海燕,孙丽萍,杨光. "A Process for Preparing High-Purity 2,2'-Dihydroxy-4,4'-dimethoxy benzophenone-5-sulfonic acid s" [P]. 中国发明专利, 专利号 CN 113278058 A, 授权公告日 2021-04-12.
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