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2-Amino-4-(3,4-dimethoxy-phenyl)-thiophene-3-carboxylic acid ethyl ester 的分子结构, CAS编号: 15854-12-32-Amino-4-(3,4-dimethoxy-phenyl)-thiophene-3-carboxylic acid ethyl ester 的分子结构, CAS编号: 15854-12-3