发明人郑宇鹏,王建平,冯建国. "Method for the Synthesis of N-{8-[(E)-(Dimethylamino)methylidene]-2,5-dioxo-5,6,7,8-tetrahydro-2H-chromen-3-yl}benzenecarboxamide" [P]. 中国发明专利, 专利号 CN 109935695 B, 授权公告日 2015-08-04.
发明人赵玉洁,黄志刚,朱建伟. "A Process for Preparing High-Purity N-{8-[(E)-(Dimethylamino)methylidene]-2,5-dioxo-5,6,7,8-tetrahydro-2H-chromen-3-yl}benzenecarboxamide" [P]. 中国发明专利, 专利号 CN 112149955 B, 授权公告日 2022-12-10.
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