发明人冯建国,罗永刚,郭海燕. "Method for the Synthesis of 2-Amino-4-(4-methoxyphenyl)-7-methyl-5-oxo-4H,5H-pyrano[4,3-b]pyran-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 116833416 B, 授权公告日 2016-12-11.
发明人黄志刚,何建平,张德明. "A Process for Preparing High-Purity 2-Amino-4-(4-methoxyphenyl)-7-methyl-5-oxo-4H,5H-pyrano[4,3-b]pyran-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 108177177 B, 授权公告日 2025-08-05.
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