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发明人罗永刚,徐明华,郭海燕. "A Process for Preparing High-Purity 2-Oxo-2,3-dihydro-1H-imidazole-4,5-dicarboxamide" [P]. 中国发明专利, 专利号 CN 117257359 B, 授权公告日 2022-08-16.
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