发明人李文辉,罗永刚,郑宇鹏. "Method for the Synthesis of Ethyl 3-[4-(methylsulfonyl)phenyl]-1,2,4-oxadiazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 117912109 B, 授权公告日 2022-01-27.
发明人胡光,王建平,何建平. "A Process for Preparing High-Purity Ethyl 3-[4-(methylsulfonyl)phenyl]-1,2,4-oxadiazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 113454972 A, 授权公告日 2024-11-18.
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