发明人陈志强,郭海燕,杨光. "Method for the Synthesis of (S)-5-Chloro-4-methyl-1H-pyrimido[4,5-d][1,3]oxazin-2(4H)-one" [P]. 中国发明专利, 专利号 CN 108661287 A, 授权公告日 2016-09-04.
发明人张德明,韩伟,李文辉. "A Process for Preparing High-Purity (S)-5-Chloro-4-methyl-1H-pyrimido[4,5-d][1,3]oxazin-2(4H)-one" [P]. 中国发明专利, 专利号 CN 110822664 B, 授权公告日 2023-05-01.
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