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发明人孙丽萍,王建平,沈红梅. "Method for the Synthesis of 2-Amino-4-[3-ethoxy-4-(propan-2-yloxy)phenyl]-7-methyl-5-oxo-4H,5H-pyrano[3,2-c]pyran-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 116361864 B, 授权公告日 2023-06-15.
发明人张德明,杨光,冯建国. "A Process for Preparing High-Purity 2-Amino-4-[3-ethoxy-4-(propan-2-yloxy)phenyl]-7-methyl-5-oxo-4H,5H-pyrano[3,2-c]pyran-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 108522012 A, 授权公告日 2020-08-08.
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