发明人罗永刚,李文辉,钱学锋. "Method for the Synthesis of 2-(2-Benzothiazolylthio)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxaldehyde" [P]. 中国发明专利, 专利号 CN 116542465 B, 授权公告日 2017-02-11.
发明人张德明,朱建伟,马晓峰. "A Process for Preparing High-Purity 2-(2-Benzothiazolylthio)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxaldehyde" [P]. 中国发明专利, 专利号 CN 109845132 B, 授权公告日 2021-03-23.
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