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发明人徐明华,高志强,郭海燕. "Method for the Synthesis of 2-(4,6-Dimethyl-2,5-dioxohexahydroimidazo[4,5-d]imidazol-1(2H)-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 115544109 B, 授权公告日 2018-04-26.
Lee S K, Park J H, Mueller T. "A Process for Preparing High-Purity 2-(4,6-Dimethyl-2,5-dioxohexahydroimidazo[4,5-d]imidazol-1(2H)-yl)acetic acid" [P]. US Patent, US 11006976 B2, 2018-12-01.
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