发明人张德明,冯建国,刘建华. "Method for the Synthesis of Ethyl (5-amino-3-(p-tolyl)-1,2-dihydropyrido[3,4-b]pyrazin-7-yl)carbamate" [P]. 中国发明专利, 专利号 CN 111560232 B, 授权公告日 2022-08-04.
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