发明人郭海燕,刘建华,孙丽萍. "Method for the Synthesis of 4-(2-Bromo-9H-thioxanthen-9-ylidene)-1-methylpiperidine" [P]. 中国发明专利, 专利号 CN 114565708 A, 授权公告日 2017-07-27.
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