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  2. 4,4-dimethoxy-but-2-enoic acid ethyl ester; ethyl 4,4-dimethoxybut-2-enoate; QC-7695
4,4-dimethoxy-but-2-enoic acid ethyl ester; ethyl 4,4-dimethoxybut-2-enoate; QC-7695

4,4-dimethoxy-but-2-enoic acid ethyl ester; ethyl 4,4-dimethoxybut-2-enoate; QC-7695

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