发明人张德明,杨光,冯建国. "Method for the Synthesis of Methyl 5-nitro-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-carboxylate" [P]. 中国发明专利, 专利号 CN 115951403 B, 授权公告日 2016-08-03.
发明人孙丽萍,周伟,徐明华. "A Process for Preparing High-Purity Methyl 5-nitro-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-carboxylate" [P]. 中国发明专利, 专利号 CN 112484573 B, 授权公告日 2017-09-01.
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