发明人徐明华,钱学锋,杨光. "Method for the Synthesis of N,N-diethyl-7-methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonamide" [P]. 中国发明专利, 专利号 CN 108380185 B, 授权公告日 2015-08-12.
发明人冯建国,马晓峰,周伟. "A Process for Preparing High-Purity N,N-diethyl-7-methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonamide" [P]. 中国发明专利, 专利号 CN 111622068 B, 授权公告日 2016-03-05.
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