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发明人张德明,郭海燕,林芳. "Method for the Synthesis of 7-Amino-2,4-dihydroxy-5-(2-nitrophenyl)-5H-pyrano[2,3-d]pyrimidine-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 114953789 A, 授权公告日 2017-01-23.
发明人冯建国,钱学锋,刘建华. "A Process for Preparing High-Purity 7-Amino-2,4-dihydroxy-5-(2-nitrophenyl)-5H-pyrano[2,3-d]pyrimidine-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 116516315 B, 授权公告日 2017-09-09.
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