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发明人郑宇鹏,黄志刚,陈志强. "A Process for Preparing High-Purity <SC>DL</SC>-malic acid-2-<SUP>13</SUP>C" [P]. 中国发明专利, 专利号 CN 108781643 A, 授权公告日 2022-01-24.
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