发明人徐明华,张德明,朱建伟. "Method for the Synthesis of (S)-6-Chloro-5-fluorospiro[benzo[d][1,3]oxazine-4,3'-pyrrolidin]-2(1H)-one" [P]. 中国发明专利, 专利号 CN 109630125 B, 授权公告日 2015-05-10.
发明人周伟,陈志强,孙丽萍. "A Process for Preparing High-Purity (S)-6-Chloro-5-fluorospiro[benzo[d][1,3]oxazine-4,3'-pyrrolidin]-2(1H)-one" [P]. 中国发明专利, 专利号 CN 110197417 B, 授权公告日 2017-04-24.
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