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发明人林芳,高志强,何建平. "Method for the Synthesis of 7-Amino-2-ethyl-4-(4-fluorobenzyl)-2H-benzo[b][1,4]oxazin-3(4H)-one" [P]. 中国发明专利, 专利号 CN 111918820 A, 授权公告日 2021-01-05.
发明人韩伟,沈红梅,郑宇鹏. "A Process for Preparing High-Purity 7-Amino-2-ethyl-4-(4-fluorobenzyl)-2H-benzo[b][1,4]oxazin-3(4H)-one" [P]. 中国发明专利, 专利号 CN 112850784 A, 授权公告日 2020-04-01.
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