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发明人李文辉,徐明华,张德明. "Method for the Synthesis of 2-Amino-4-(4-ethoxy-phenyl)-thiophene-3-carboxylic acid methyl ester
2-amino-4-(4-ethoxyphenyl)thiophene-3-carboxylic acid methyl ester
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methyl 2-amino-4-(4-ethoxyphenyl)thiophene-3-carboxylate" [P]. 中国发明专利, 专利号 CN 109915020 B, 授权公告日 2015-12-18.
Fischer A B, Anderson J P, Schröder R. "A Process for Preparing High-Purity 2-Amino-4-(4-ethoxy-phenyl)-thiophene-3-carboxylic acid methyl ester
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methyl 2-amino-4-(4-ethoxyphenyl)thiophene-3-carboxylate" [P]. US Patent, US 11077532 B2, 2022-07-07.
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