发明人孙丽萍,郭海燕,冯建国. "Method for the Synthesis of 4-[4-(4-methoxyphenyl)piperazin-1-yl]-4-oxo-but-2-enoic acid" [P]. 中国发明专利, 专利号 CN 109619499 A, 授权公告日 2018-08-23.
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